Pub Date : 2022-12-06DOI: 10.1080/00202967.2022.2149689
A. Richter, P. Leisner
The FEM (Forschungs Institute Edelmetalle und Metallchemie) in Schwäbisch Gmünd, Germany, is the world’s only independent Institute for Precious Metals Research. In autumn 1922, the research institute began its work in the rooms of the former Royal College for the Precious Metals Industry. One hundred years have passed since then and the FEM has retained its independence and the same mission today as it had then: the transfer of technology solutions in the fields of materials science and surface technology to industry and in particular to small and medium-sized enterprises. Under the motto ‘On to new heights!’, around 200 guests from politics, business, science and culture celebrated the anniversary of the Schwäbisch Gmünd research institute on the 22nd of September, 2022. Among them, were the national representatives of the European Board of the European Academy of Surface Technology (EAST), who took the opportunity to arrange a workshop in connection with the celebration (Figure 1). The workshop focused on funding tools supporting European networking and research and education cooperation in the field of surface technology and connected areas. Minister-President Winfried Kretschmann congratulated the FEM on its 100th birthday and paid tribute to the life’s work of Institute Director Dr. Andreas Zielonka, who will be taking his well-deserved retirement after 28 successful years as Institute Director. In their greetings, Ministerial Director Michael Kleiner from the BadenWürttemberg Ministry of Economics, Labour and Tourism, Lord Mayor of Schwäbish Gmünd Richard Arnold and District Administrator Dr Joachim Bläse emphasised the FEM’s outstanding importance in the research and development of metallic materials and coatings, especially for small and medium-sized enterprises. The current critical developments showed that the economy in Germany can only be successful if the transfer of innovation and technology from applied research to companies is quick and uncomplicated. It is the task of politics to create the best possible framework conditions for initial research and to recognise the high relevance of non-university, independent research institutions.
位于德国Schwäbisch gm nd的Forschungs研究所(Forschungs Institute Edelmetalle und Metallchemie)是世界上唯一独立的贵金属研究所。1922年秋，研究所在前皇家贵金属工业学院的房间里开始工作。从那时起，一百年过去了，FEM保持了它的独立性，今天的使命与当时一样:将材料科学和表面技术领域的技术解决方案转让给工业，特别是中小型企业。在“迈向新高度!”，来自政界、商界、科学界和文化界的约200位嘉宾于2022年9月22日庆祝了Schwäbisch gm nd研究所成立一周年。其中包括欧洲表面技术学院(EAST)欧洲委员会的国家代表，他们借此机会安排了一个与庆祝活动相关的研讨会(图1)。研讨会的重点是资助工具，支持欧洲在表面技术和相关领域的网络和研究与教育合作。温弗里德·克雷奇曼部长祝贺FEM成立100周年，并对研究所所长安德烈亚斯·齐隆卡博士毕生的工作表示敬意。在成功担任研究所所长28年后，他将当之无愧地退休。巴登堡州经济、劳工和旅游局局长Michael Kleiner、Schwäbish gm州市长Richard Arnold和地区行政长官Joachim Bläse在致辞中强调了FEM在金属材料和涂料的研究和开发方面的突出重要性，特别是对中小型企业的重要性。当前的关键发展表明，只有当创新和技术从应用研究向企业的转移迅速而简单时，德国经济才能取得成功。政治的任务是为初步研究创造最好的框架条件，并承认非大学独立研究机构的高度相关性。
{"title":"New key persons when research institute on precious metals turns 100 years old","authors":"A. Richter, P. Leisner","doi":"10.1080/00202967.2022.2149689","DOIUrl":"https://doi.org/10.1080/00202967.2022.2149689","url":null,"abstract":"The FEM (Forschungs Institute Edelmetalle und Metallchemie) in Schwäbisch Gmünd, Germany, is the world’s only independent Institute for Precious Metals Research. In autumn 1922, the research institute began its work in the rooms of the former Royal College for the Precious Metals Industry. One hundred years have passed since then and the FEM has retained its independence and the same mission today as it had then: the transfer of technology solutions in the fields of materials science and surface technology to industry and in particular to small and medium-sized enterprises. Under the motto ‘On to new heights!’, around 200 guests from politics, business, science and culture celebrated the anniversary of the Schwäbisch Gmünd research institute on the 22nd of September, 2022. Among them, were the national representatives of the European Board of the European Academy of Surface Technology (EAST), who took the opportunity to arrange a workshop in connection with the celebration (Figure 1). The workshop focused on funding tools supporting European networking and research and education cooperation in the field of surface technology and connected areas. Minister-President Winfried Kretschmann congratulated the FEM on its 100th birthday and paid tribute to the life’s work of Institute Director Dr. Andreas Zielonka, who will be taking his well-deserved retirement after 28 successful years as Institute Director. In their greetings, Ministerial Director Michael Kleiner from the BadenWürttemberg Ministry of Economics, Labour and Tourism, Lord Mayor of Schwäbish Gmünd Richard Arnold and District Administrator Dr Joachim Bläse emphasised the FEM’s outstanding importance in the research and development of metallic materials and coatings, especially for small and medium-sized enterprises. The current critical developments showed that the economy in Germany can only be successful if the transfer of innovation and technology from applied research to companies is quick and uncomplicated. It is the task of politics to create the best possible framework conditions for initial research and to recognise the high relevance of non-university, independent research institutions.","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75941050","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}
Pub Date : 2022-12-06DOI: 10.1080/00202967.2022.2149687
H. Kanematsu
Prof. Hideyuki Kanematsu, Ph.D. FIMF, the Specially Appointed Professor at the National Institute of Technology (NIT) (KOSEN), Suzuka College in Japan, has been appointed as Fellow of ASM International, the materials science information society in the United States and this was celebrated in the Fellow Induction Ceremony held in New Orleans, recently. The citation for his appointment was ‘outstanding contributions to the field of elucidation of corrosion/ degradation behaviors and surface characteristics for a variety of materials’. While he has heldmany administrative positions in Suzuka College such as its Deputy President, he has undertaken studies of many surface phenomena of materials from the viewpoint of surface finishing. He is now particularly interested in biofilms and the interfacial phenomena between metallic surfaces and organisms from an environmental science point of view. He is also involvedwith the research and development of anti-infectious materials against bacteria and viruses and also how to measure and evaluate the anti-infectivity. He holds a B.Eng. (1981), an M.Eng. (1983) and a Ph.D. in Materials Science and Engineering (1989), all from Nagoya University. In addition to the IMF, for which he serves on the Editorial Board of Transactions, he is a member of the US societies National Association for Surface Finishing (NASF), the Minerals, Metals and Materials Society (TMS), ASM International, Electrochemical Society (ECS), American Chemical Society (ACS), and in his home country, the Japan Institute of Metals (JIM) and the Iron and Steel Institute of Japan (ISIJ), Surface Finishing Society of Japan (SFSJ), the Electrochemical Society of Japan (ECSJ), the Japan Society for Heat Treatment (JSHT), Japan Thermal Spray Society (JTSS), among others. For all of these organisations, he is still very active as a member, and also as a board member. On April 30, the GEAR 5.0 Project of the National Institute of Technology (KOSEN) in Japan began formally. Prof. Kanematsu became the UNIT Leader (Director) of the Materials Science Research Centre (KOSEN Centre for Innovative Research, Collaboration, and the Use of Implemented Technology) supported by the national project. In April 2021, he was honoured by receiving the Prize of the Minister of Education, Culture, Sports, Science and Technology for his outstanding long years of contributions to education and research.
{"title":"IMF Fellow Prof. Hideyuki Kanematsu is awarded Fellowship of ASM International","authors":"H. Kanematsu","doi":"10.1080/00202967.2022.2149687","DOIUrl":"https://doi.org/10.1080/00202967.2022.2149687","url":null,"abstract":"Prof. Hideyuki Kanematsu, Ph.D. FIMF, the Specially Appointed Professor at the National Institute of Technology (NIT) (KOSEN), Suzuka College in Japan, has been appointed as Fellow of ASM International, the materials science information society in the United States and this was celebrated in the Fellow Induction Ceremony held in New Orleans, recently. The citation for his appointment was ‘outstanding contributions to the field of elucidation of corrosion/ degradation behaviors and surface characteristics for a variety of materials’. While he has heldmany administrative positions in Suzuka College such as its Deputy President, he has undertaken studies of many surface phenomena of materials from the viewpoint of surface finishing. He is now particularly interested in biofilms and the interfacial phenomena between metallic surfaces and organisms from an environmental science point of view. He is also involvedwith the research and development of anti-infectious materials against bacteria and viruses and also how to measure and evaluate the anti-infectivity. He holds a B.Eng. (1981), an M.Eng. (1983) and a Ph.D. in Materials Science and Engineering (1989), all from Nagoya University. In addition to the IMF, for which he serves on the Editorial Board of Transactions, he is a member of the US societies National Association for Surface Finishing (NASF), the Minerals, Metals and Materials Society (TMS), ASM International, Electrochemical Society (ECS), American Chemical Society (ACS), and in his home country, the Japan Institute of Metals (JIM) and the Iron and Steel Institute of Japan (ISIJ), Surface Finishing Society of Japan (SFSJ), the Electrochemical Society of Japan (ECSJ), the Japan Society for Heat Treatment (JSHT), Japan Thermal Spray Society (JTSS), among others. For all of these organisations, he is still very active as a member, and also as a board member. On April 30, the GEAR 5.0 Project of the National Institute of Technology (KOSEN) in Japan began formally. Prof. Kanematsu became the UNIT Leader (Director) of the Materials Science Research Centre (KOSEN Centre for Innovative Research, Collaboration, and the Use of Implemented Technology) supported by the national project. In April 2021, he was honoured by receiving the Prize of the Minister of Education, Culture, Sports, Science and Technology for his outstanding long years of contributions to education and research.","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85958632","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}
Pub Date : 2022-10-19DOI: 10.1080/00202967.2022.2127512
A. Pingale, Ayush Owhal, S. Belgamwar, J. Rathore
ABSTRACT In the present work, multi-walled carbon nanotube (MWCNT) nanofiller reinforced copper-nickel alloy (CuNi@MWCNTs) nanocomposites were synthesised by a modified electro-chemical co-deposition followed by compaction and sintering. During this method, CuNi@MWCNTs were co-deposited on a cathode tip at room temperature and collected from the electro-chemical bath in powdered form. Subsequently, the powdered nanocomposites were dried, compacted and sintered to prepare solid pellets. The influence of different amounts (25, 50 and 100 mg L−1) of MWCNT nanofillers in the deposition bath on microstructure, mechanical and anti-corrosion properties of CuNi@MWCNTs nanocomposites was investigated. The microhardness, compressive yield strength and friction coefficient of CuNi@MWCNTs (100 mg L−1) nanocomposites were enhanced by 45.7%, 37.2% and 55.1%, respectively, compared to that of pure CuNi alloy. In addition, the CuNi@MWCNTs nanocomposites obtained also exhibited improved anti-corrosion property in 3.5 wt.% NaCl solution at continuous agitation of 150 rpm and 27°C temperature. Based on the research outcomes, this approach for synthesising CuNi@MWCNTs nanocomposites may be proposed for scale-up industrial trials.
{"title":"Co-deposited CuNi@MWCNTs nanocomposites for structural applications: tribo-mechanical and anti-corrosion performances","authors":"A. Pingale, Ayush Owhal, S. Belgamwar, J. Rathore","doi":"10.1080/00202967.2022.2127512","DOIUrl":"https://doi.org/10.1080/00202967.2022.2127512","url":null,"abstract":"ABSTRACT In the present work, multi-walled carbon nanotube (MWCNT) nanofiller reinforced copper-nickel alloy (CuNi@MWCNTs) nanocomposites were synthesised by a modified electro-chemical co-deposition followed by compaction and sintering. During this method, CuNi@MWCNTs were co-deposited on a cathode tip at room temperature and collected from the electro-chemical bath in powdered form. Subsequently, the powdered nanocomposites were dried, compacted and sintered to prepare solid pellets. The influence of different amounts (25, 50 and 100 mg L−1) of MWCNT nanofillers in the deposition bath on microstructure, mechanical and anti-corrosion properties of CuNi@MWCNTs nanocomposites was investigated. The microhardness, compressive yield strength and friction coefficient of CuNi@MWCNTs (100 mg L−1) nanocomposites were enhanced by 45.7%, 37.2% and 55.1%, respectively, compared to that of pure CuNi alloy. In addition, the CuNi@MWCNTs nanocomposites obtained also exhibited improved anti-corrosion property in 3.5 wt.% NaCl solution at continuous agitation of 150 rpm and 27°C temperature. Based on the research outcomes, this approach for synthesising CuNi@MWCNTs nanocomposites may be proposed for scale-up industrial trials.","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78173552","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}
Pub Date : 2022-10-04DOI: 10.1080/00202967.2022.2112873
F. C. Walsh
{"title":"Biographical note on H.C. Hamaker 1905–1993","authors":"F. C. Walsh","doi":"10.1080/00202967.2022.2112873","DOIUrl":"https://doi.org/10.1080/00202967.2022.2112873","url":null,"abstract":"","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84593981","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}
Pub Date : 2022-10-04DOI: 10.1080/00202967.2022.2123630
{"title":"IMF qualification modules","authors":"","doi":"10.1080/00202967.2022.2123630","DOIUrl":"https://doi.org/10.1080/00202967.2022.2123630","url":null,"abstract":"","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82258156","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}
Pub Date : 2022-10-04DOI: 10.1080/00202967.2022.2124033
C. Larson, V. Jayalakshmi, K. Subramanian, Xueren Dai, Sheng Guo, D. Lazarova, M. Georgieva, M. Petrova, D. Tachev, G. Avdeev, J. Smith, D. Lamprou, S. J. Upson, G. Triantafyllidis
{"title":"Annual Contents 2022","authors":"C. Larson, V. Jayalakshmi, K. Subramanian, Xueren Dai, Sheng Guo, D. Lazarova, M. Georgieva, M. Petrova, D. Tachev, G. Avdeev, J. Smith, D. Lamprou, S. J. Upson, G. Triantafyllidis","doi":"10.1080/00202967.2022.2124033","DOIUrl":"https://doi.org/10.1080/00202967.2022.2124033","url":null,"abstract":"","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75348510","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}
Pub Date : 2022-10-04DOI: 10.1080/00202967.2022.2124057
Published in Transactions of the IMF: The International Journal of Surface Engineering and Coatings (Vol. 100, No. 6, 2022)
发表于国际货币基金组织:国际表面工程与涂层杂志(Vol. 100, No. 6, 2022)
{"title":"Transactions of the Institute of Materials Finishing 2022, volume 100Author Index","authors":"","doi":"10.1080/00202967.2022.2124057","DOIUrl":"https://doi.org/10.1080/00202967.2022.2124057","url":null,"abstract":"Published in Transactions of the IMF: The International Journal of Surface Engineering and Coatings (Vol. 100, No. 6, 2022)","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138537852","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}
Pub Date : 2022-09-26DOI: 10.1080/00202967.2022.2123154
M. Georgieva, D. Lazarova, M. Petrova, B. Tzaneva, E. Dobreva
ABSTRACT One of the widely used plastics for chemical metallisation is acrylonitrile butadiene styrene (ABS). It is a strong and flexible plastic, which makes it suitable for the preparation of details with a complex shape and leads to optimum design qualities. Metallised plastics combine the properties of dielectrics and metals, thanks to which they find application in many branches of industry. Before the chemical metallisation of samples, they are subjected to pretreatment, which includes a number of operations. Among them the most important are: etching (surface micro-roughening of the surface) and activation (adsorption of catalytically active metal centres on the surface). Prior to performing the etching operation, the surface of the polymer samples is relatively smooth. In order to increase the roughness of the surface and to facilitate the subsequent operations, an additional operation of “swelling” is included, preceding the etching operation. The influence of the swelling operation on the quality of the final electroless Cu and Ni-P coatings has been studied in the present work. The experimental results show that metal coatings with uniform thickness and good adhesion are obtained.
{"title":"Modification of the surface of ABS polymer by swelling operation and its influence on some properties of electroless deposited metal coatings","authors":"M. Georgieva, D. Lazarova, M. Petrova, B. Tzaneva, E. Dobreva","doi":"10.1080/00202967.2022.2123154","DOIUrl":"https://doi.org/10.1080/00202967.2022.2123154","url":null,"abstract":"ABSTRACT One of the widely used plastics for chemical metallisation is acrylonitrile butadiene styrene (ABS). It is a strong and flexible plastic, which makes it suitable for the preparation of details with a complex shape and leads to optimum design qualities. Metallised plastics combine the properties of dielectrics and metals, thanks to which they find application in many branches of industry. Before the chemical metallisation of samples, they are subjected to pretreatment, which includes a number of operations. Among them the most important are: etching (surface micro-roughening of the surface) and activation (adsorption of catalytically active metal centres on the surface). Prior to performing the etching operation, the surface of the polymer samples is relatively smooth. In order to increase the roughness of the surface and to facilitate the subsequent operations, an additional operation of “swelling” is included, preceding the etching operation. The influence of the swelling operation on the quality of the final electroless Cu and Ni-P coatings has been studied in the present work. The experimental results show that metal coatings with uniform thickness and good adhesion are obtained.","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86704715","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}
Pub Date : 2022-09-21DOI: 10.1080/00202967.2022.2111121
M. Kocabaş
ABSTRACT In this study, the colour anodising of a Ti-6Al-4V alloy in 0.05 M H3PO4 was investigated in the voltage range of 40–100 V. The Ti-6Al-4V substrates were anodised under two initial surface conditions: ground and unground. By means of ground samples, the native oxide layer was removed before anodising using conventional mechanical grinding techniques. After anodising, the changes in surface chemistry and topography were evaluated by performing Field Emission Scanning Electron Microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Depending on the initial surface finish (ground and unground) and the anodising voltage, different interference colours were obtained on the anodised surfaces. At low anodising voltages, the surfaces displayed relatively compact structures whereas higher voltages resulted in the formation of porosity, cracks, and blisters in both conditions. These changes also influenced the corrosion behaviour. The samples which were ground prior to anodising exhibited higher resistance to corrosion compared to the unground samples.
研究了Ti-6Al-4V合金在0.05 M H3PO4中在40-100 V电压范围内的彩色阳极氧化。Ti-6Al-4V衬底在接地和非接地两种初始表面条件下进行阳极氧化。通过研磨样品，在阳极氧化前使用常规机械研磨技术去除天然氧化层。阳极氧化后，通过场发射扫描电子显微镜、x射线衍射和x射线光电子能谱来评估表面化学和形貌的变化。根据初始表面光洁度(研磨和未研磨)和阳极氧化电压，在阳极氧化表面上获得不同的干涉颜色。在低阳极氧化电压下，表面显示出相对致密的结构，而较高的电压在两种情况下都会导致孔隙、裂纹和水泡的形成。这些变化也影响了腐蚀行为。与未研磨的样品相比，在阳极氧化前研磨的样品具有更高的耐腐蚀性。
{"title":"Effect of surface finish on the colour anodising of Ti-6Al-4V at various voltages","authors":"M. Kocabaş","doi":"10.1080/00202967.2022.2111121","DOIUrl":"https://doi.org/10.1080/00202967.2022.2111121","url":null,"abstract":"ABSTRACT In this study, the colour anodising of a Ti-6Al-4V alloy in 0.05 M H3PO4 was investigated in the voltage range of 40–100 V. The Ti-6Al-4V substrates were anodised under two initial surface conditions: ground and unground. By means of ground samples, the native oxide layer was removed before anodising using conventional mechanical grinding techniques. After anodising, the changes in surface chemistry and topography were evaluated by performing Field Emission Scanning Electron Microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Depending on the initial surface finish (ground and unground) and the anodising voltage, different interference colours were obtained on the anodised surfaces. At low anodising voltages, the surfaces displayed relatively compact structures whereas higher voltages resulted in the formation of porosity, cracks, and blisters in both conditions. These changes also influenced the corrosion behaviour. The samples which were ground prior to anodising exhibited higher resistance to corrosion compared to the unground samples.","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74797300","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}
Pub Date : 2022-09-14DOI: 10.1080/00202967.2022.2107771
P. Bagheri, S. Saber-Samandari, A. Sadeghi, S. Akhtarian, A. Doostmohammadi
ABSTRACT In this research, hydroxyapatite powder particles were coated on a Ti-6Al-4V alloy substrate by the plasma spraying method to create bone implants by benefitting from titanium's mechanical properties and hydroxyapatite's biological properties. Hydroxyapatite prepared by the plasma spraying method suffers from decomposition, formation of other calcium phosphate phases, weak adhesion to the substrate, and microcrack formation in the coating due to residual stresses initiated by the high temperature of the coating process. To improve the hydroxyapatite coating properties, the Ti-6Al-4V alloy was preheated, and then hydroxyapatite coating took place. The results showed that residual stress in the interface decreased, and adhesion improved by preheating the substrate. However, formation of an amorphous phase on coating was observed, resulting in a higher dissolution rate in the biological environment and weak mechanical properties compared to crystalline hydroxyapatite. Experimental results showed that heat treatment after the coating process decreased the amount of this amorphous phase and heightened the crystallinity of the coating by up to more than 60%.
{"title":"Hydroxyapatite nanoparticles coating on Ti-6Al-4V substrate using plasma spray method","authors":"P. Bagheri, S. Saber-Samandari, A. Sadeghi, S. Akhtarian, A. Doostmohammadi","doi":"10.1080/00202967.2022.2107771","DOIUrl":"https://doi.org/10.1080/00202967.2022.2107771","url":null,"abstract":"ABSTRACT In this research, hydroxyapatite powder particles were coated on a Ti-6Al-4V alloy substrate by the plasma spraying method to create bone implants by benefitting from titanium's mechanical properties and hydroxyapatite's biological properties. Hydroxyapatite prepared by the plasma spraying method suffers from decomposition, formation of other calcium phosphate phases, weak adhesion to the substrate, and microcrack formation in the coating due to residual stresses initiated by the high temperature of the coating process. To improve the hydroxyapatite coating properties, the Ti-6Al-4V alloy was preheated, and then hydroxyapatite coating took place. The results showed that residual stress in the interface decreased, and adhesion improved by preheating the substrate. However, formation of an amorphous phase on coating was observed, resulting in a higher dissolution rate in the biological environment and weak mechanical properties compared to crystalline hydroxyapatite. Experimental results showed that heat treatment after the coating process decreased the amount of this amorphous phase and heightened the crystallinity of the coating by up to more than 60%.","PeriodicalId":23251,"journal":{"name":"Transactions of the IMF","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78627521","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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