In this study, aluminium composites reinforced with 10 wt% SiC and 4 wt% kaoline were synthesized through the spark plasma sintering (SPS) technique at different sintering temperatures of 560 ⁰C, 580 ⁰C and 600 ⁰C. The influence of the sintering temperatures on the microstructure and mechanical properties was investigated. Results demonstrate that the maximum relative density (RD), hardness, compression strength, and tensile strength of 96 %, 72 Hv, 284 MPa, and 263 MPa respectively for the composite sintered at 580 ⁰C. The agglomerations were identified at 560 ⁰C through SEM analysis due to improper sintering of the SiC reinforcements which deteriorated the strength of the composite. The presence of dimples on the tensile fractured surface at 580 ⁰C confirms the ductile fracture. However, the existence of intergranular cleavages and particle debonding at 560 ⁰C and 600 ⁰C promotes the brittle fracture.
{"title":"Synergistic effect of sintering temperature on microstructure, mechanical properties, and fractography analysis of spark plasma sintered Al-10 %SiC-4 %Kaoline composite","authors":"V.S.S. Venkatesh, Pandu Ranga Vundavilli, M.M. Mahapatra","doi":"10.1016/j.matlet.2024.137625","DOIUrl":"10.1016/j.matlet.2024.137625","url":null,"abstract":"<div><div>In this study, aluminium composites reinforced with 10 wt% SiC and 4 wt% kaoline were synthesized through the spark plasma sintering (SPS) technique at different sintering temperatures of 560 ⁰C, 580 ⁰C and 600 ⁰C. The influence of the sintering temperatures on the microstructure and mechanical properties was investigated. Results demonstrate that the maximum relative density (RD), hardness, compression strength, and tensile strength of 96 %, 72 Hv, 284 MPa, and 263 MPa respectively for the composite sintered at 580 ⁰C. The agglomerations were identified at 560 ⁰C through SEM analysis due to improper sintering of the SiC reinforcements which deteriorated the strength of the composite. The presence of dimples on the tensile fractured surface at 580 ⁰C confirms the ductile fracture. However, the existence of intergranular cleavages and particle debonding at 560 ⁰C and 600 ⁰C promotes the brittle fracture.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137625"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.matlet.2024.137618
Guillaume Lefebvre , Nicolas Trcera , Michael Paris , Yann Morizet
Chlorine local environment has been investigated using spectroscopic approach (XAS and XPS) for Na- and Ca-bearing aluminoborosilicate glasses synthesised at 1.0 GPa. Based on Cl K-edge EXAFS results, Cl appears to show two local environments in glasses: one at long distance ∼2.7 Å assigned to Cl- species charge compensated by Na+ and/or Ca2+ and one at short distance ∼1.8 Å assigned to Cl-Cl and Si-Cl species. The Cl 2p XPS results cannot unambiguously confirm the presence of Si-Cl overlapped with Na+/Ca2+…Cl- species.
我们使用光谱方法（XAS 和 XPS）研究了在 1.0 GPa 下合成的含 Na 和 Ca 的铝硼硅酸盐玻璃的氯局部环境。根据 Cl K-edge EXAFS 的结果，Cl 在玻璃中似乎显示出两种局部环境：一种位于长距离 ∼ 2.7 Å 处，属于由 Na+ 和/或 Ca2+ 补偿电荷的 Cl- 物种；另一种位于短距离 ∼ 1.8 Å 处，属于 Cl-Cl 和 Si-Cl 物种。Cl 2p XPS 结果不能明确证实存在与 Na+/Ca2+...Cl-物种重叠的 Si-Cl。
{"title":"Spectroscopic approach to chlorine local environment in aluminoborosilicate glasses","authors":"Guillaume Lefebvre , Nicolas Trcera , Michael Paris , Yann Morizet","doi":"10.1016/j.matlet.2024.137618","DOIUrl":"10.1016/j.matlet.2024.137618","url":null,"abstract":"<div><div>Chlorine local environment has been investigated using spectroscopic approach (XAS and XPS) for Na- and Ca-bearing aluminoborosilicate glasses synthesised at 1.0 GPa. Based on Cl K-edge EXAFS results, Cl appears to show two local environments in glasses: one at long distance ∼2.7 Å assigned to Cl<sup>-</sup> species charge compensated by Na<sup>+</sup> and/or Ca<sup>2+</sup> and one at short distance ∼1.8 Å assigned to Cl-Cl and Si-Cl species. The Cl 2p XPS results cannot unambiguously confirm the presence of Si-Cl overlapped with Na<sup>+</sup>/Ca<sup>2+</sup>…Cl<sup>-</sup> species.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137618"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.matlet.2024.137629
Ruxia Liu , Mengyu Zhang , Wei Zhao , Jian Zhang , Yong Xiao , Guilin Wu , Shuize Wang , Xinping Mao
The precipitation evolution and aging hardening effect of Zn alloying on the Mg-Sc alloy were analyzed in this study. Needle-like nanosized ScZn precipitates from the matrix at low-temperature aging, bulk-like ScZn precipitation gradually forms at high temperatures above 600 °C. Moreover, the α-phase also precipitates from the matrix during aging. The initial hardness of the solid solution β-phase alloy was almost 126.7 ± 3.2HV, the hardness of the alloy increases first and then decreases with the increase of the aging temperature from 200 °C to 600 °C. The alloy aged at 300 °C owns the highest hardness of 196.9 ± 6.9HV, further TEM reveals that the coherent nanosized α-phase precipitate with the Burgers orientation relations of β-phase and the needle-like ScZn precipitates are the main factors for the aging hardening of this Mg-Sc-Zn alloy after aging at 300 °C. These findings may provide the scientific basis for the alloying design of high-performance Mg-Sc alloys.
{"title":"Aging hardening and precipitation evolution of Mg-Sc alloy with Zn alloying","authors":"Ruxia Liu , Mengyu Zhang , Wei Zhao , Jian Zhang , Yong Xiao , Guilin Wu , Shuize Wang , Xinping Mao","doi":"10.1016/j.matlet.2024.137629","DOIUrl":"10.1016/j.matlet.2024.137629","url":null,"abstract":"<div><div>The precipitation evolution and aging hardening effect of Zn alloying on the Mg-Sc alloy were analyzed in this study. Needle-like nanosized ScZn precipitates from the matrix at low-temperature aging, bulk-like ScZn precipitation gradually forms at high temperatures above 600 °C. Moreover, the α-phase also precipitates from the matrix during aging. The initial hardness of the solid solution β-phase alloy was almost 126.7 ± 3.2HV, the hardness of the alloy increases first and then decreases with the increase of the aging temperature from 200 °C to 600 °C. The alloy aged at 300 °C owns the highest hardness of 196.9 ± 6.9HV, further TEM reveals that the coherent nanosized α-phase precipitate with the Burgers orientation relations of β-phase and the needle-like ScZn precipitates are the main factors for the aging hardening of this Mg-Sc-Zn alloy after aging at 300 °C. These findings may provide the scientific basis for the alloying design of high-performance Mg-Sc alloys.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137629"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.matlet.2024.137622
Aiswarya Johnson , A. Shameem , S. Sanjana , A. Murugan , V. Siva , Mohamed Hussien
Developing cost-effective and eco-friendly supercapacitors has attracted increasing attention in high-energy supercapacitors constrained by the limited candidates. In this work, cerium molybdate is prepared by facile microwave combustion method. Powder XRD and FTIR analyses confirm the formation of Ce(MoO4)2. The nanostructure morphology and elemental ratio have been studied by FE-SEM equipped with EDS. The electrochemical behavior is assessed in three and two-electrode systems exhibiting a high specific capacitance (Csp) of 582.34 F/g at 6 A/g (3-electrode system). Asymmetric device displays maximum Csp of 242.64 F/g and energy density of 75.83 Wh/kg at 1 A/g. The results suggest that the prepared Ce(MoO4)2 nanoparticles can be used as a potential candidate for high-performance energy storage applications.
{"title":"Facile microwave synthesis of cerium molybdate as an electrode material for high-performance supercapacitor application in redox-additive electrolyte","authors":"Aiswarya Johnson , A. Shameem , S. Sanjana , A. Murugan , V. Siva , Mohamed Hussien","doi":"10.1016/j.matlet.2024.137622","DOIUrl":"10.1016/j.matlet.2024.137622","url":null,"abstract":"<div><div>Developing cost-effective and eco-friendly supercapacitors has attracted increasing attention in high-energy supercapacitors constrained by the limited candidates. In this work, cerium molybdate is prepared by facile microwave combustion method. Powder XRD and FTIR analyses confirm the formation of Ce(MoO<sub>4</sub>)<sub>2</sub>. The nanostructure morphology and elemental ratio have been studied by FE-SEM equipped with EDS. The electrochemical behavior is assessed in three and two-electrode systems exhibiting a high specific capacitance (C<sub>sp</sub>) of 582.34 F/g at 6 A/g (3-electrode system). Asymmetric device displays maximum C<sub>sp</sub> of 242.64 F/g and energy density of 75.83 Wh/kg at 1 A/g. The results suggest that the prepared Ce(MoO<sub>4</sub>)<sub>2</sub> nanoparticles can be used as a potential candidate for high-performance energy storage applications.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137622"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.matlet.2024.137628
Puli Wang , Jinyao Ma , Peizhi Cui , Tong Wang , Nan Dong , Peide Han
Niobium (Nb) addition could enhance the thermal stability of Super304H through the formation of Nb(C, N) precipitates. This study proposes an innovative two-step gradient cooling strategy that promotes dispersed Fe, Cr, Ni-round Nb(C, N) re-precipitation in the matrix. Through the strategy, the deleterious precipitation of M23C6 at grain boundaries (GBs) is significantly inhibited compared to the solution-treated Super304H during 650 °C isothermal aging. The distribution and element optimized Nb(C, N) through the strategy is of great significance for improving the thermal stability and intergranular corrosion (IGC) resistance of Super304H during service.
{"title":"Enhancement of intergranular corrosion resistance of Super304H by a two-step gradient cooling strategy","authors":"Puli Wang , Jinyao Ma , Peizhi Cui , Tong Wang , Nan Dong , Peide Han","doi":"10.1016/j.matlet.2024.137628","DOIUrl":"10.1016/j.matlet.2024.137628","url":null,"abstract":"<div><div>Niobium (Nb) addition could enhance the thermal stability of Super304H through the formation of Nb(C, N) precipitates. This study proposes an innovative two-step gradient cooling strategy that promotes dispersed Fe, Cr, Ni-round Nb(C, N) re-precipitation in the matrix. Through the strategy, the deleterious precipitation of M<sub>23</sub>C<sub>6</sub> at grain boundaries (GBs) is significantly inhibited compared to the solution-treated Super304H during 650 °C isothermal aging. The distribution and element optimized Nb(C, N) through the strategy is of great significance for improving the thermal stability and intergranular corrosion (IGC) resistance of Super304H during service.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137628"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.matlet.2024.137616
Haiyan Wang, Ran Jia, Zhenhua Li, Zhiqiang Wang, Dongyan Cao, Chunling Wang, Xiaodi Huo, Kang Xu, Lei Xu
Piezoelectric materials have been widely used in various fields such as sensing and energy catalysis. This paper primarily investigates the structural, electronic and piezoelectric properties of hydrogenated II-VI monolayer semiconductor XYH2 (X = Zn, Cd; Y = S, Se, Te) by density functional theory. Results reveal that XYH2 monolayers exhibit stable hexagonal structures and tunable bandgaps ranging from 3.27 eV to 4.30 eV. Density functional perturbation theory is employed to investigate the out-of-plane piezoelectric coefficients of XYH2 monolayers. CdSH2 exhibits a value of −1.8 pm/V of out-of-plane piezoelectric coefficients which surpasses typical piezoelectric materials such as bulk ZnS (0.076 pm/V), ZnO (0.21 pm/V), CdS (0.143 pm/V), CdSe (0.104 pm/V), BN (0.33 pm/V) and GaN (0.96 pm/V). Our results indicate that hydrogenated II-VI monolayers can be a new type of novel piezoelectric semiconductors and hold a potential application for the piezoelectric devices.
{"title":"Density functional theory study on the electronic structures and piezoelectric properties of hydrogenated monolayer II-VI semiconductor XYH2 (X = Zn, Cd; Y = S, Se, Te)","authors":"Haiyan Wang, Ran Jia, Zhenhua Li, Zhiqiang Wang, Dongyan Cao, Chunling Wang, Xiaodi Huo, Kang Xu, Lei Xu","doi":"10.1016/j.matlet.2024.137616","DOIUrl":"10.1016/j.matlet.2024.137616","url":null,"abstract":"<div><div>Piezoelectric materials have been widely used in various fields such as sensing and energy catalysis. This paper primarily investigates the structural, electronic and piezoelectric properties of hydrogenated II-VI monolayer semiconductor XYH<sub>2</sub> (X = Zn, Cd; Y = S, Se, Te) by density functional theory. Results reveal that XYH<sub>2</sub> monolayers exhibit stable hexagonal structures and tunable bandgaps ranging from 3.27 eV to 4.30 eV. Density functional perturbation theory is employed to investigate the out-of-plane piezoelectric coefficients of XYH<sub>2</sub> monolayers. CdSH<sub>2</sub> exhibits a value of −1.8 pm/V of out-of-plane piezoelectric coefficients which surpasses typical piezoelectric materials such as bulk ZnS (0.076 pm/V), ZnO (0.21 pm/V), CdS (0.143 pm/V), CdSe (0.104 pm/V), BN (0.33 pm/V) and GaN (0.96 pm/V). Our results indicate that hydrogenated II-VI monolayers can be a new type of novel piezoelectric semiconductors and hold a potential application for the piezoelectric devices.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137616"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Electroless Ni-B coatings with excellent wear resistance have been reported by widely varying bath compositions in different research works. If a database can be made, trained using artificial intelligence (AI) and optimized, a readily available model with correlation of bath parameters and coating properties would be available for the scientific community and industries. In this work, an effort has been made to list the composition reported in some works, train them using artificial neural network (ANN) and find an optimal condition leading to higher deposition and hardness of the coatings using non-dominated sorting genetic algorithm (NSGA). The predicted bath has good correlation with experimental results (R2 ∼ 1). The usual nodular morphology was seen with amorphous structure. A high as-deposited hardness of 950–1075 HV0.1, ∼10 µm/h deposition rate and first critical load of failure (Lc) > 24 N was detected. Thus, this work serves as a preliminary model for predicting coating with enhanced quality without having to perform numerous experiments thereby saving cost and time with substantial accuracy.
{"title":"Development of Ni-B coating through the aid of artificial intelligence","authors":"Subhash Kumar, Arun Kumar Kadian, Mukesh Sharma, Anil C. Mahato, Arkadeb Mukhopadhyay","doi":"10.1016/j.matlet.2024.137621","DOIUrl":"10.1016/j.matlet.2024.137621","url":null,"abstract":"<div><div>Electroless Ni-B coatings with excellent wear resistance have been reported by widely varying bath compositions in different research works. If a database can be made, trained using artificial intelligence (AI) and optimized, a readily available model with correlation of bath parameters and coating properties would be available for the scientific community and industries. In this work, an effort has been made to list the composition reported in some works, train them using artificial neural network (ANN) and find an optimal condition leading to higher deposition and hardness of the coatings using non-dominated sorting genetic algorithm (NSGA). The predicted bath has good correlation with experimental results (R<sup>2</sup> ∼ 1). The usual nodular morphology was seen with amorphous structure. A high as-deposited hardness of 950–1075 HV<sub>0.1</sub>, ∼10 µm/h deposition rate and first critical load of failure (L<sub>c</sub>) > 24 N was detected. Thus, this work serves as a preliminary model for predicting coating with enhanced quality without having to perform numerous experiments thereby saving cost and time with substantial accuracy.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137621"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.matlet.2024.137620
Min Yu, Zhihua Chang, Peiyuan Lv, Hui Chen
To address the inherent challenge of optimizing both strength and conductivity of the CuCrZr alloy, cold spraying is employed to enhance its surface with a comprehensive range of performance attributes. A novel gradient structure, featuring a SiC/CuCrZr layer at the top and an AlN/CuCrZr layer at the bottom, successfully fulfills the comprehensive requirements for wear resistance and thermal conductivity. Results show that the composite coating is composed of extensively deformed CuCrZr particles and undeformed ceramic particles and its microhardness and thermal conductivity closely adhere to the rule of mixtures. Additionally, the gradient coating shows the equivalent wear resistance to the SiC-CuCrZr coating. This study demonstrates the remarkable versatility of cold spraying in fabricating seamless gradient coating, while achieving predictable and controllable variations in microhardness and thermal conductivity across the coating’s thickness.
{"title":"Achievement of comprehensive wear and thermal property of cold spayed CuCrZr coating via gradient structure design","authors":"Min Yu, Zhihua Chang, Peiyuan Lv, Hui Chen","doi":"10.1016/j.matlet.2024.137620","DOIUrl":"10.1016/j.matlet.2024.137620","url":null,"abstract":"<div><div>To address the inherent challenge of optimizing both strength and conductivity of the CuCrZr alloy, cold spraying is employed to enhance its surface with a comprehensive range of performance attributes. A novel gradient structure, featuring a SiC/CuCrZr layer at the top and an AlN/CuCrZr layer at the bottom, successfully fulfills the comprehensive requirements for wear resistance and thermal conductivity. Results show that the composite coating is composed of extensively deformed CuCrZr particles and undeformed ceramic particles and its microhardness and thermal conductivity closely adhere to the rule of mixtures. Additionally, the gradient coating shows the equivalent wear resistance to the SiC-CuCrZr coating. This study demonstrates the remarkable versatility of cold spraying in fabricating seamless gradient coating, while achieving predictable and controllable variations in microhardness and thermal conductivity across the coating’s thickness.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137620"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.matlet.2024.137626
Tejas Gundgire , Suvi Santa-aho , Timo Rautio , Minnamari Vippola
Laser powder bed fusion (LPBF) effectively fabricates intricate 316L stainless steel components but often results in significant tensile residual stresses and anisotropic microstructures, compromising mechanical performance. Solution annealing at 1050–1100 °C reduces anisotropy along with mitigating these stresses but may reduce stress corrosion cracking resistance (SCC). Therefore, this study combined solution annealing with severe shot peening (SSP) to enhance the surface properties and the SCC performance. The results showed that SSP introduced compressive residual stresses exceeding −700 MPa on the surface and up to 300 µm in depth, significantly reducing tensile stresses. Additionally, SSP increased surface hardness and halved surface roughness, potentially enhancing stress corrosion cracking resistance and mechanical performance, establishing SSP as an effective post-processing technique for LPBF 316L components.
{"title":"Severe shot peening: A promising solution for mitigating stress corrosion cracking in solution-annealed LPBF 316 l stainless steel","authors":"Tejas Gundgire , Suvi Santa-aho , Timo Rautio , Minnamari Vippola","doi":"10.1016/j.matlet.2024.137626","DOIUrl":"10.1016/j.matlet.2024.137626","url":null,"abstract":"<div><div>Laser powder bed fusion (LPBF) effectively fabricates intricate 316L stainless steel components but often results in significant tensile residual stresses and anisotropic microstructures, compromising mechanical performance. Solution annealing at 1050–1100 °C reduces anisotropy along with mitigating these stresses but may reduce stress corrosion cracking resistance (SCC). Therefore, this study combined solution annealing with severe shot peening (SSP) to enhance the surface properties and the SCC performance. The results showed that SSP introduced compressive residual stresses exceeding −700 MPa on the surface and up to 300 µm in depth, significantly reducing tensile stresses. Additionally, SSP increased surface hardness and halved surface roughness, potentially enhancing stress corrosion cracking resistance and mechanical performance, establishing SSP as an effective post-processing technique for LPBF 316L components.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137626"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.matlet.2024.137630
Wenqian Wang, Zhangcheng Liu, Xiao Wang, Yang Li, Jinping Ao
The temperature dependence I-V characteristics of the diamond Schottky diode based on selective grown diamond film has been characterized in a range from room temperature up to 473 K. The selective growth of diamond between tungsten mask can contain some acceptor impurities without intentionally doping. In the range 298–473 K, the I-V curves show an obvious temperature dependency. The voltage sensitivity is segmented into two ranges: 298 K–373 K and 373 K–473 K. The maximum sensitivities are 104 mV/K in the range 298 K–373 K and 18 mV/K in the range 373 K–473 K. Repeated measurement exhibits a good agreement with the first time’s results, indicating that the barrier between tungsten and selective grown diamond is thermally stable.
基于选择性生长金刚石薄膜的金刚石肖特基二极管的 I-V 特性在室温至 473 K 范围内具有温度依赖性。在 298-473 K 范围内，I-V 曲线显示出明显的温度依赖性。电压灵敏度分为两个范围：298 K-373 K 和 373 K-473 K。
{"title":"High sensitive diamond Schottky diode temperature sensor based on selective grown diamond film","authors":"Wenqian Wang, Zhangcheng Liu, Xiao Wang, Yang Li, Jinping Ao","doi":"10.1016/j.matlet.2024.137630","DOIUrl":"10.1016/j.matlet.2024.137630","url":null,"abstract":"<div><div>The temperature dependence I-V characteristics of the diamond Schottky diode based on selective grown diamond film has been characterized in a range from room temperature up to 473 K. The selective growth of diamond between tungsten mask can contain some acceptor impurities without intentionally doping. In the range 298–473 K, the I-V curves show an obvious temperature dependency. The voltage sensitivity is segmented into two ranges: 298 K–373 K and 373 K–473 K. The maximum sensitivities are 104 mV/K in the range 298 K–373 K and 18 mV/K in the range 373 K–473 K. Repeated measurement exhibits a good agreement with the first time’s results, indicating that the barrier between tungsten and selective grown diamond is thermally stable.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"378 ","pages":"Article 137630"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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