V. Podhurska, Oleksandr Kuprin, M. Bortnitskaya, Orest Ostash, T.A. Prikhna, Roman Chepil, Volodymyr Sverdun, I. Kolodiy, Vitaliy Belous
The composition, structure, and tribological characteristics at 20 °C and 500 °C of coatings obtained by the vacuum arc deposition method using a MAX phase Ti2AlC based cathode were investigated. These characteristics were compared to those of titanium nitride coating. It was shown that at a potential of -50 V, a composite coating of TiC and Ti3AlC phases forms. Meanwhile, at a potential of -100 V, a composite consisting of TiC and α-Ti is formed. At 20 °C, the friction coefficient and specific wear rate of these coatings in contact with a ball made of ShKh15 steel under a load of 2 N are comparable to those of TiN coating. At 500 °C, the wear resistance of the composite (TiC+α-Ti) coating is twice as high as that of TiN coatings. There was no clear correlation between microhardness and the tribological characteristics of the coatings.
研究了使用基于 MAX 相 Ti2AlC 阴极的真空电弧沉积法获得的涂层在 20 °C 和 500 °C 时的成分、结构和摩擦学特性。将这些特性与氮化钛涂层的特性进行了比较。结果表明，在电位为 -50 V 时，会形成 TiC 和 Ti3AlC 相的复合涂层。同时，在电位为 -100 V 时，形成了由 TiC 和 α-Ti 组成的复合涂层。在 20 °C 时，这些涂层与 ShKh15 钢球接触时的摩擦系数和比磨损率与 TiN 涂层相当，载荷为 2 N。在 500 °C 时，复合涂层（TiC+α-Ti）的耐磨性是 TiN 涂层的两倍。涂层的显微硬度与摩擦学特性之间没有明显的相关性。
{"title":"Structural and Tribology Properties of Ti-Al-C Coatings Deposited by Vacuum Arc Method","authors":"V. Podhurska, Oleksandr Kuprin, M. Bortnitskaya, Orest Ostash, T.A. Prikhna, Roman Chepil, Volodymyr Sverdun, I. Kolodiy, Vitaliy Belous","doi":"10.4028/p-w89obm","DOIUrl":"https://doi.org/10.4028/p-w89obm","url":null,"abstract":"The composition, structure, and tribological characteristics at 20 °C and 500 °C of coatings obtained by the vacuum arc deposition method using a MAX phase Ti2AlC based cathode were investigated. These characteristics were compared to those of titanium nitride coating. It was shown that at a potential of -50 V, a composite coating of TiC and Ti3AlC phases forms. Meanwhile, at a potential of -100 V, a composite consisting of TiC and α-Ti is formed. At 20 °C, the friction coefficient and specific wear rate of these coatings in contact with a ball made of ShKh15 steel under a load of 2 N are comparable to those of TiN coating. At 500 °C, the wear resistance of the composite (TiC+α-Ti) coating is twice as high as that of TiN coatings. There was no clear correlation between microhardness and the tribological characteristics of the coatings.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"30 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139775987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rihashni Thivagaran, Mohd Radzi Aridi, Nurjannah Salim, K. Chong, Nurul Huda Abu Bakar
Poor corrosion and wear resistance of metallic materials lead to deterioration of their properties and may cause failures. In fundamental, corrosion is due to the reaction of metals with their surroundings, such as moisture, salts, and air pollutants. On the other hand, wear is a surface failure because of continuous dynamic contact between the metals' surfaces and other surfaces. In this regard, surface protection such as coatings is crucial to ensure the long life of the metallic materials. Among the surface protection available, graphene-based coatings have emerged as the most researched topic due to their excellent impermeability, chemical inertness, high hardness, and flexibility. It is reported that graphene-metal and graphene-polymer nanocomposite coatings offer versatile protection against corrosion and abrasive wear. Therefore, this review presents the current state-of-the-art graphene-based nanocomposite coatings in the field of corrosion and abrasive wear resistance. This review provides significant approach of graphene-metal and graphene-polymer, as well as the future perspectives of graphene-based coatings.
{"title":"Improvement on Corrosion and Wear Resistance of Graphene-Based Coatings: A Review","authors":"Rihashni Thivagaran, Mohd Radzi Aridi, Nurjannah Salim, K. Chong, Nurul Huda Abu Bakar","doi":"10.4028/p-e1n7jc","DOIUrl":"https://doi.org/10.4028/p-e1n7jc","url":null,"abstract":"Poor corrosion and wear resistance of metallic materials lead to deterioration of their properties and may cause failures. In fundamental, corrosion is due to the reaction of metals with their surroundings, such as moisture, salts, and air pollutants. On the other hand, wear is a surface failure because of continuous dynamic contact between the metals' surfaces and other surfaces. In this regard, surface protection such as coatings is crucial to ensure the long life of the metallic materials. Among the surface protection available, graphene-based coatings have emerged as the most researched topic due to their excellent impermeability, chemical inertness, high hardness, and flexibility. It is reported that graphene-metal and graphene-polymer nanocomposite coatings offer versatile protection against corrosion and abrasive wear. Therefore, this review presents the current state-of-the-art graphene-based nanocomposite coatings in the field of corrosion and abrasive wear resistance. This review provides significant approach of graphene-metal and graphene-polymer, as well as the future perspectives of graphene-based coatings.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"21 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139774289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nur Syafiqah Binti Ismail, Syed Muhammad Aiman Bin Syed Mohd Hakhiri, Siti Noor Hidayah Binti Mustapha, Aliff Hisyam Bin Bin A Razak, Mohd. Hairul Bin Ab. Rahim, Shamsul Bin Zakaria
The electromechanical performances of dielectric elastomers were investigated after the incorporation of the confined permittivity enhancing fillers in bacteria cellulose (BC) into polydimethylsiloxane (PDMS) films. The purpose of this study is to investigate the capability of BC as a confinement matrix for the permittivity enhancing fillers to overcome the low relative permittivity and at the same time to increase the softness of the PDMS films. The metal oxide and silicone oil were confined in BC before being physically mixed with PDMS at different percentages. The results showed that the confined TiO2-BC increased the relative permittivity and at the same time maintained the softness of the PDMS films to some extent. In addition to that, by adding confined silicone oil-BC into the PDMS films, this PDMS based dielectric elastomer (DE) becomes even softer.
在聚二甲基硅氧烷（PDMS）薄膜中加入细菌纤维素（BC）中的约束介电常数增强填料后，研究了介电弹性体的机电性能。本研究的目的是考察 BC 作为增强介电常数填料的封闭基质在克服低相对介电常数的同时增加 PDMS 薄膜柔软度的能力。先将金属氧化物和硅油封闭在 BC 中，然后再按不同比例与 PDMS 进行物理混合。结果表明，封闭的 TiO2-BC 提高了相对介电常数，同时在一定程度上保持了 PDMS 薄膜的柔软性。此外，通过在 PDMS 薄膜中加入封闭硅油-BC，这种基于 PDMS 的介电弹性体（DE）变得更加柔软。
{"title":"Confinement of the Permittivity Enhancing Fillers in Bacterial Cellulose for Dielectric Elastomer Applications","authors":"Nur Syafiqah Binti Ismail, Syed Muhammad Aiman Bin Syed Mohd Hakhiri, Siti Noor Hidayah Binti Mustapha, Aliff Hisyam Bin Bin A Razak, Mohd. Hairul Bin Ab. Rahim, Shamsul Bin Zakaria","doi":"10.4028/p-n7l0ve","DOIUrl":"https://doi.org/10.4028/p-n7l0ve","url":null,"abstract":"The electromechanical performances of dielectric elastomers were investigated after the incorporation of the confined permittivity enhancing fillers in bacteria cellulose (BC) into polydimethylsiloxane (PDMS) films. The purpose of this study is to investigate the capability of BC as a confinement matrix for the permittivity enhancing fillers to overcome the low relative permittivity and at the same time to increase the softness of the PDMS films. The metal oxide and silicone oil were confined in BC before being physically mixed with PDMS at different percentages. The results showed that the confined TiO2-BC increased the relative permittivity and at the same time maintained the softness of the PDMS films to some extent. In addition to that, by adding confined silicone oil-BC into the PDMS films, this PDMS based dielectric elastomer (DE) becomes even softer.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"934 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139835383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rihashni Thivagaran, Mohd Radzi Aridi, Nurjannah Salim, K. Chong, Nurul Huda Abu Bakar
Poor corrosion and wear resistance of metallic materials lead to deterioration of their properties and may cause failures. In fundamental, corrosion is due to the reaction of metals with their surroundings, such as moisture, salts, and air pollutants. On the other hand, wear is a surface failure because of continuous dynamic contact between the metals' surfaces and other surfaces. In this regard, surface protection such as coatings is crucial to ensure the long life of the metallic materials. Among the surface protection available, graphene-based coatings have emerged as the most researched topic due to their excellent impermeability, chemical inertness, high hardness, and flexibility. It is reported that graphene-metal and graphene-polymer nanocomposite coatings offer versatile protection against corrosion and abrasive wear. Therefore, this review presents the current state-of-the-art graphene-based nanocomposite coatings in the field of corrosion and abrasive wear resistance. This review provides significant approach of graphene-metal and graphene-polymer, as well as the future perspectives of graphene-based coatings.
{"title":"Improvement on Corrosion and Wear Resistance of Graphene-Based Coatings: A Review","authors":"Rihashni Thivagaran, Mohd Radzi Aridi, Nurjannah Salim, K. Chong, Nurul Huda Abu Bakar","doi":"10.4028/p-e1n7jc","DOIUrl":"https://doi.org/10.4028/p-e1n7jc","url":null,"abstract":"Poor corrosion and wear resistance of metallic materials lead to deterioration of their properties and may cause failures. In fundamental, corrosion is due to the reaction of metals with their surroundings, such as moisture, salts, and air pollutants. On the other hand, wear is a surface failure because of continuous dynamic contact between the metals' surfaces and other surfaces. In this regard, surface protection such as coatings is crucial to ensure the long life of the metallic materials. Among the surface protection available, graphene-based coatings have emerged as the most researched topic due to their excellent impermeability, chemical inertness, high hardness, and flexibility. It is reported that graphene-metal and graphene-polymer nanocomposite coatings offer versatile protection against corrosion and abrasive wear. Therefore, this review presents the current state-of-the-art graphene-based nanocomposite coatings in the field of corrosion and abrasive wear resistance. This review provides significant approach of graphene-metal and graphene-polymer, as well as the future perspectives of graphene-based coatings.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"556 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139834055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maryna Storozhenko, O. Umanskyi, Oleksiy Melnyk, O. Terentyev, Tatiana Chevychelova, V. Varchenko, O. Koval, V. Brazhevsky, O. Chernyshov
Thermally sprayed cermet coatings are widely used in many engineering applications to protect against wear and corrosion. In this study, three kinds of (Ti,Cr)C-based powders with 18, 25, 33 wt.% content of Ni binder were deposited onto stainless steel substrates by plasma spraying technique. The microstructure and dry sliding wear resistance of the (Ti,Cr)C-Ni coatings were investigated. The (Ti,Cr)C-Ni coatings have a heterogeneous structure composed of (Ti,Cr)C particles and Ni binder. Fracture and partial dissolution of the (Ti,Cr)C particles were found to occur during the plasma spray process. Among all the tested coatings, (Ti,Cr)C-33wt.%Ni coating exhibits lower wear rates and friction coefficients under all conditions. Worn surfaces of the coatings were analyzed using SEM to investigate the wear mechanism. With the increase in Ni content from 18 up to 33wt.%Ni wear mechanism of the (Ti,Cr)C-Ni coatings changes from abrasive to tribo-oxidation.
{"title":"Microstructure and Tribological Behavior of Plasma Sprayed (Ti,Cr)C-Ni Composite Coatings","authors":"Maryna Storozhenko, O. Umanskyi, Oleksiy Melnyk, O. Terentyev, Tatiana Chevychelova, V. Varchenko, O. Koval, V. Brazhevsky, O. Chernyshov","doi":"10.4028/p-2xixtj","DOIUrl":"https://doi.org/10.4028/p-2xixtj","url":null,"abstract":"Thermally sprayed cermet coatings are widely used in many engineering applications to protect against wear and corrosion. In this study, three kinds of (Ti,Cr)C-based powders with 18, 25, 33 wt.% content of Ni binder were deposited onto stainless steel substrates by plasma spraying technique. The microstructure and dry sliding wear resistance of the (Ti,Cr)C-Ni coatings were investigated. The (Ti,Cr)C-Ni coatings have a heterogeneous structure composed of (Ti,Cr)C particles and Ni binder. Fracture and partial dissolution of the (Ti,Cr)C particles were found to occur during the plasma spray process. Among all the tested coatings, (Ti,Cr)C-33wt.%Ni coating exhibits lower wear rates and friction coefficients under all conditions. Worn surfaces of the coatings were analyzed using SEM to investigate the wear mechanism. With the increase in Ni content from 18 up to 33wt.%Ni wear mechanism of the (Ti,Cr)C-Ni coatings changes from abrasive to tribo-oxidation.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"252 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139834625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kamaal Al-hamdani, Moheimen Al-Thamir, Mohammed Jameel Sahi, A. A. Abed
Using of metal matrix composite coating is a promising approach for improving the surface properties of a component against the mechanical and environmental attacks especially wear and corrosion. Laser cladding (LC), also known as direct energy deposition (DED), is an additive manufacturing (AM) technique, able to perform coating, repair worn parts, manufacturing and prototyping. In this work, pure Al and a mixture of multi-ceramic Al-15SiC-15Al2O3 coatings were successfully deposited on Al-based substrate. The quality of the deposited clads was evaluated according to macro-graphic, microstructure, and microhardness characteristics. The microscopic inspection of the multi-ceramic coatings showed a slight dilution of SiC particles. Also, XRD investigation revealed a formation of Al4C3 carbide. Besides SiC and Al2O3 hard phases, this yielded an increase in matrix microhardness about 180% (from 75 to 212 Hv0.05) as compared to pure Al clads, indicating a great improvement in the mechanical properties of the composite cladded coating.
使用金属基复合材料涂层是一种很有前途的方法，可以提高部件的表面性能，抵御机械和环境的侵蚀，特别是磨损和腐蚀。激光熔覆（LC），又称直接能量沉积（DED），是一种快速成型制造（AM）技术，能够进行涂层、修复磨损部件、制造和原型开发。在这项工作中，成功地在铝基基底上沉积了纯铝和多陶瓷 Al-15SiC-15Al2O3 涂层的混合物。根据宏观图形、微观结构和显微硬度特征对沉积覆层的质量进行了评估。多陶瓷涂层的显微镜检查显示，SiC 颗粒略有稀释。此外，XRD 研究还发现了 Al4C3 碳化物的形成。除了 SiC 和 Al2O3 硬质相之外，与纯 Al 堆焊层相比，基体显微硬度增加了约 180%（从 75 Hv0.05 增加到 212 Hv0.05），这表明复合堆焊涂层的机械性能得到了极大改善。
{"title":"Deposition of Multi-Ceramic Aluminium-Matrix Composite Coating by Direct Laser Deposition","authors":"Kamaal Al-hamdani, Moheimen Al-Thamir, Mohammed Jameel Sahi, A. A. Abed","doi":"10.4028/p-B7oLNl","DOIUrl":"https://doi.org/10.4028/p-B7oLNl","url":null,"abstract":"Using of metal matrix composite coating is a promising approach for improving the surface properties of a component against the mechanical and environmental attacks especially wear and corrosion. Laser cladding (LC), also known as direct energy deposition (DED), is an additive manufacturing (AM) technique, able to perform coating, repair worn parts, manufacturing and prototyping. In this work, pure Al and a mixture of multi-ceramic Al-15SiC-15Al2O3 coatings were successfully deposited on Al-based substrate. The quality of the deposited clads was evaluated according to macro-graphic, microstructure, and microhardness characteristics. The microscopic inspection of the multi-ceramic coatings showed a slight dilution of SiC particles. Also, XRD investigation revealed a formation of Al4C3 carbide. Besides SiC and Al2O3 hard phases, this yielded an increase in matrix microhardness about 180% (from 75 to 212 Hv0.05) as compared to pure Al clads, indicating a great improvement in the mechanical properties of the composite cladded coating.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"83 23","pages":"69 - 78"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. A. Mocktar, Muhammad Naquiddin Mustafa, Noor Aniza Harun, Wan Iryani, Wan Ismail, I. Idris
The utilization of Marphysa moribidii, a local marine baitworm (Polychaeta), as a possible biogenic reducing agent in the synthesis of AuNPs was successfully performed. In this particular study, different age classes of M. moribidii based on their body widths that classified as Class I (3 – 5 mm), Class II (6 – 8 mm), and Class III (9 – 11 mm) were employed in the biosynthesis of AuNPs. The use of different age classes of M. moribidii for the biosynthesis of AuNPs is a fascinating approach that takes advantage of the varying metabolic activities of the different age groups. The colour changes of the solution from yellow to red ruby is the initial observation for the successful biosynthesis of AuNPs where AuNPs_II shows the fastest changes of colour after 2 h incubation and maintains stable for over 1 month of storage. Further confirmation was depicted from the existence of surface Plasmon resonance (SPR) absorption peaks in a range of 545 – 552 nm from UV-Vis spectroscopy. TEM analysis shows the formation of spherical-like shape of biosynthesis AuNPs with average particle size around 42 – 57 nm where AuNPs_II had the smaller particle size. Lastly, the antibacterial assessment of biosynthesized produced from different age classes of M. moribidii had good antibacterial activity against Gram-negative bacteria, but poor activity against Gram-positive bacteria. AuNPs produced from Class II M. moribidii (AuNPs_II) provide the highest ZOI value of 13 mm. The utilization of different age classes of M. moribidii for the biosynthesis of metal nanoparticles is an interesting pathway for designing a novel method that can be considered nature-friendly, safe, and hopeful for the future.
{"title":"Biosynthesis and Characterizations of Gold Nanoparticles (AuNPs) Prepare Using Different Age Classes of Marphysa moribidii (Polychaetes) Extract as Biogenic Reducing Agents","authors":"N. A. Mocktar, Muhammad Naquiddin Mustafa, Noor Aniza Harun, Wan Iryani, Wan Ismail, I. Idris","doi":"10.4028/p-nk1gIv","DOIUrl":"https://doi.org/10.4028/p-nk1gIv","url":null,"abstract":"The utilization of Marphysa moribidii, a local marine baitworm (Polychaeta), as a possible biogenic reducing agent in the synthesis of AuNPs was successfully performed. In this particular study, different age classes of M. moribidii based on their body widths that classified as Class I (3 – 5 mm), Class II (6 – 8 mm), and Class III (9 – 11 mm) were employed in the biosynthesis of AuNPs. The use of different age classes of M. moribidii for the biosynthesis of AuNPs is a fascinating approach that takes advantage of the varying metabolic activities of the different age groups. The colour changes of the solution from yellow to red ruby is the initial observation for the successful biosynthesis of AuNPs where AuNPs_II shows the fastest changes of colour after 2 h incubation and maintains stable for over 1 month of storage. Further confirmation was depicted from the existence of surface Plasmon resonance (SPR) absorption peaks in a range of 545 – 552 nm from UV-Vis spectroscopy. TEM analysis shows the formation of spherical-like shape of biosynthesis AuNPs with average particle size around 42 – 57 nm where AuNPs_II had the smaller particle size. Lastly, the antibacterial assessment of biosynthesized produced from different age classes of M. moribidii had good antibacterial activity against Gram-negative bacteria, but poor activity against Gram-positive bacteria. AuNPs produced from Class II M. moribidii (AuNPs_II) provide the highest ZOI value of 13 mm. The utilization of different age classes of M. moribidii for the biosynthesis of metal nanoparticles is an interesting pathway for designing a novel method that can be considered nature-friendly, safe, and hopeful for the future.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"29 12","pages":"129 - 135"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138955191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Tsui, A-Cheng Wang, Biing-Hwa Yan, Chunwei Yang
This research aims to study the electropolishing conducted under vacuum status. The electropolishing can be used to finishing high purity components of SUS 316L to make them shine and without leaving residual stress, micro-cracks, etc. In the research, the electropolishing process parameters are selected, such as current density, degree of vacuum and polishing time to conduct the electropolishing experiment. The experimental results show that the bubbles attached to the surface of the work-piece in the vacuum state are reduced, thereby improving the surface roughness and surface pitting. The vacuum status in the process can improve the electropolishing process.
这项研究旨在研究在真空状态下进行的电抛光。电抛光可用于精加工 SUS 316L 的高纯度部件，使其光亮且不留残余应力、微裂纹等。研究选择了电流密度、真空度和抛光时间等电抛光工艺参数来进行电抛光实验。实验结果表明，真空状态下工件表面附着的气泡减少，从而改善了表面粗糙度和表面麻点。工艺中的真空状态可以改善电抛光工艺。
{"title":"Electropolishing Research for Stainless Steel Surface Finishing under Vacuum Status","authors":"H. Tsui, A-Cheng Wang, Biing-Hwa Yan, Chunwei Yang","doi":"10.4028/p-YXa8Bg","DOIUrl":"https://doi.org/10.4028/p-YXa8Bg","url":null,"abstract":"This research aims to study the electropolishing conducted under vacuum status. The electropolishing can be used to finishing high purity components of SUS 316L to make them shine and without leaving residual stress, micro-cracks, etc. In the research, the electropolishing process parameters are selected, such as current density, degree of vacuum and polishing time to conduct the electropolishing experiment. The experimental results show that the bubbles attached to the surface of the work-piece in the vacuum state are reduced, thereby improving the surface roughness and surface pitting. The vacuum status in the process can improve the electropolishing process.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"21 1","pages":"25 - 31"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139169429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Direct diamond deposition on a steel surface has been considered very difficult. Recently, we found that high-quality diamond films can be deposited on the surface of stainless-steel X5CrNi 18-10 by drilling multiple regularly arranged pits without interlayers or seeding. The following two hypotheses (A) and (B) can be considered as the reason why a high-quality diamond film can be deposited: (A) unoxidized Cr and Ni exposed to the stainless-steel X5CrNi 18-10 surface prevent carbon diffusion into interior of the stainless-steel, resulting diamond core generation, (B) Surface geometry with regular roughness contributes to stress relaxation and delamination prevention. In the present study, those hypotheses have been examined by quantum chemistry calculation and experimental. For the quantum chemistry calculation, energy barrier and kinetic energy for a carbon atom intrudes into a model cluster has been calculated with an ab-initio computational chemistry software package, Gaussian. The calculation result has supported hypothesis (A). For the experiment, X5CrNi 18-10 stainless-steel substrates with different surface characteristics are prepared by using various mechanical machining methods and used in the direct deposition process for diamond with in-liquid plasma CVD. The experimental result has supported both hypothesis (A) and (B).
{"title":"Effect of Mechanically Created Pits Pattern for Direct Diamond Deposition on Stainless-Steel Surface","authors":"Ryoya Shiraishi, Hiromichi Toyota, Hidekazu Goto, Xia Zhu, Yukiharu Iwamoto, Kosuke Okamoto","doi":"10.4028/p-vf0NZL","DOIUrl":"https://doi.org/10.4028/p-vf0NZL","url":null,"abstract":"Direct diamond deposition on a steel surface has been considered very difficult. Recently, we found that high-quality diamond films can be deposited on the surface of stainless-steel X5CrNi 18-10 by drilling multiple regularly arranged pits without interlayers or seeding. The following two hypotheses (A) and (B) can be considered as the reason why a high-quality diamond film can be deposited: (A) unoxidized Cr and Ni exposed to the stainless-steel X5CrNi 18-10 surface prevent carbon diffusion into interior of the stainless-steel, resulting diamond core generation, (B) Surface geometry with regular roughness contributes to stress relaxation and delamination prevention. In the present study, those hypotheses have been examined by quantum chemistry calculation and experimental. For the quantum chemistry calculation, energy barrier and kinetic energy for a carbon atom intrudes into a model cluster has been calculated with an ab-initio computational chemistry software package, Gaussian. The calculation result has supported hypothesis (A). For the experiment, X5CrNi 18-10 stainless-steel substrates with different surface characteristics are prepared by using various mechanical machining methods and used in the direct deposition process for diamond with in-liquid plasma CVD. The experimental result has supported both hypothesis (A) and (B).","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"87 20","pages":"3 - 14"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Linlin Zhao, Yue Lu, Ren Jie Xue, Qing Zhang, Yun Zhe Gao, Bao Guo Nian, Cheng Ma
The Ultrahigh strength Q&P automotive steel, i.e. QP980, has a broad application prospect in lightweight due to its high strength and good plasticity. In this study, the range of heat input (30 ~ 40 J/mm) was selected by controlling laser power in laser welding of QP980 in order to investigate the microstructure and properties of welded joint. At the heat input of 30 ~ 40 J/mm, the joint of QP980 had acceptable penetration. The weld widths were 417.93 mm, 582.02 mm and 521.56 mm, respectively. The macroscopic morphology of the joint is hourglass type. The microhardness of the welded joint hardening zone is higher than that of the base metal, and the maximum value is 519 HV0.5. When the heat input is 35 J/mm, the tensile strength of the welded joint is 1109 MPa. The maximum joint factor is 91.88 %. The fracture is close to the base metal. A large number of dimples are observed on the fracture surface, implying as ductile fracture. Based on the EBSD results, the proportion of low angle grain boundary was consistent with mechanical properties. A large number of deformation twins are formed in the 35 J/mm sample through deformation, which has a great contribution to the strength of the weld.
{"title":"Microstructure Characterization and Mechanical Properties of Laser Welded Super High Strength QP980 Automotive Steel","authors":"Linlin Zhao, Yue Lu, Ren Jie Xue, Qing Zhang, Yun Zhe Gao, Bao Guo Nian, Cheng Ma","doi":"10.4028/p-7WU8lU","DOIUrl":"https://doi.org/10.4028/p-7WU8lU","url":null,"abstract":"The Ultrahigh strength Q&P automotive steel, i.e. QP980, has a broad application prospect in lightweight due to its high strength and good plasticity. In this study, the range of heat input (30 ~ 40 J/mm) was selected by controlling laser power in laser welding of QP980 in order to investigate the microstructure and properties of welded joint. At the heat input of 30 ~ 40 J/mm, the joint of QP980 had acceptable penetration. The weld widths were 417.93 mm, 582.02 mm and 521.56 mm, respectively. The macroscopic morphology of the joint is hourglass type. The microhardness of the welded joint hardening zone is higher than that of the base metal, and the maximum value is 519 HV0.5. When the heat input is 35 J/mm, the tensile strength of the welded joint is 1109 MPa. The maximum joint factor is 91.88 %. The fracture is close to the base metal. A large number of dimples are observed on the fracture surface, implying as ductile fracture. Based on the EBSD results, the proportion of low angle grain boundary was consistent with mechanical properties. A large number of deformation twins are formed in the 35 J/mm sample through deformation, which has a great contribution to the strength of the weld.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"25 4","pages":"99 - 116"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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