Microstructure, Wear Resistance and Oxidation Behavior of Ni-Ti-Si Coatings Fabricated on Ti6Al4V by Laser Cladding
The Ni-Ti-Si composite coatings were successfully fabricated on Ti6Al4V by laser cladding. The microstructure were studied by SEM (scanning electron microscopy) and EDS (energy dispersive spectrometer). It has been found that Ti2Ni and Ti5Si3 phases exist in all coatings, and some samples have TiSi2...
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doaj-a7e19cc682cd46a1b2f637ad0e70cabc2020-11-24T21:10:34ZengMDPI AGMaterials1996-19442017-10-011011124810.3390/ma10111248ma10111248Microstructure, Wear Resistance and Oxidation Behavior of Ni-Ti-Si Coatings Fabricated on Ti6Al4V by Laser CladdingQiaoqiao Zhuang0Peilei Zhang1Mingchuan Li2Hua Yan3Zhishui Yu4Qinghua Lu5School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaThe Ni-Ti-Si composite coatings were successfully fabricated on Ti6Al4V by laser cladding. The microstructure were studied by SEM (scanning electron microscopy) and EDS (energy dispersive spectrometer). It has been found that Ti2Ni and Ti5Si3 phases exist in all coatings, and some samples have TiSi2 phases. Moreover, due to the existence of these phases, coatings presented relatively higher microhardness than that of the substrate (826 HV (Vickers hardness)) and the microhardness value of coating 3 is about twice larger than that of the substrate. During the dry sliding friction and wear test, due to the distribution of the relatively ductile phase of Ti2Ni and reinforcement phases of Ti5Si3 and TiSi2, the coatings performed good wear resistance. The oxidation process contains two stages: the rapid oxidation and slow oxidation by high temperature oxidation test at 800 °C for 50 h. Meanwhile, the value of the oxidation weight gain of the substrate is approximately three times larger than that of the coating 4. During the oxidation process, the oxidation film formed on the coating is mainly consisted of TiO2, Al2O3 and SiO2. Phases Ti2Ni, Ti5Si3, TiSi2 and TiSi were still found and it could be responsible for the improvement in oxidation resistance of the coatings by laser cladding.https://www.mdpi.com/1996-1944/10/11/1248Ni-Ti-Si composite coatingslaser claddingwear resistancehigh-temperature oxidation resistance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qiaoqiao Zhuang Peilei Zhang Mingchuan Li Hua Yan Zhishui Yu Qinghua Lu |
spellingShingle |
Qiaoqiao Zhuang Peilei Zhang Mingchuan Li Hua Yan Zhishui Yu Qinghua Lu Microstructure, Wear Resistance and Oxidation Behavior of Ni-Ti-Si Coatings Fabricated on Ti6Al4V by Laser Cladding Materials Ni-Ti-Si composite coatings laser cladding wear resistance high-temperature oxidation resistance |
author_facet |
Qiaoqiao Zhuang Peilei Zhang Mingchuan Li Hua Yan Zhishui Yu Qinghua Lu |
author_sort |
Qiaoqiao Zhuang |
title |
Microstructure, Wear Resistance and Oxidation Behavior of Ni-Ti-Si Coatings Fabricated on Ti6Al4V by Laser Cladding |
title_short |
Microstructure, Wear Resistance and Oxidation Behavior of Ni-Ti-Si Coatings Fabricated on Ti6Al4V by Laser Cladding |
title_full |
Microstructure, Wear Resistance and Oxidation Behavior of Ni-Ti-Si Coatings Fabricated on Ti6Al4V by Laser Cladding |
title_fullStr |
Microstructure, Wear Resistance and Oxidation Behavior of Ni-Ti-Si Coatings Fabricated on Ti6Al4V by Laser Cladding |
title_full_unstemmed |
Microstructure, Wear Resistance and Oxidation Behavior of Ni-Ti-Si Coatings Fabricated on Ti6Al4V by Laser Cladding |
title_sort |
microstructure, wear resistance and oxidation behavior of ni-ti-si coatings fabricated on ti6al4v by laser cladding |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2017-10-01 |
description |
The Ni-Ti-Si composite coatings were successfully fabricated on Ti6Al4V by laser cladding. The microstructure were studied by SEM (scanning electron microscopy) and EDS (energy dispersive spectrometer). It has been found that Ti2Ni and Ti5Si3 phases exist in all coatings, and some samples have TiSi2 phases. Moreover, due to the existence of these phases, coatings presented relatively higher microhardness than that of the substrate (826 HV (Vickers hardness)) and the microhardness value of coating 3 is about twice larger than that of the substrate. During the dry sliding friction and wear test, due to the distribution of the relatively ductile phase of Ti2Ni and reinforcement phases of Ti5Si3 and TiSi2, the coatings performed good wear resistance. The oxidation process contains two stages: the rapid oxidation and slow oxidation by high temperature oxidation test at 800 °C for 50 h. Meanwhile, the value of the oxidation weight gain of the substrate is approximately three times larger than that of the coating 4. During the oxidation process, the oxidation film formed on the coating is mainly consisted of TiO2, Al2O3 and SiO2. Phases Ti2Ni, Ti5Si3, TiSi2 and TiSi were still found and it could be responsible for the improvement in oxidation resistance of the coatings by laser cladding. |
topic |
Ni-Ti-Si composite coatings laser cladding wear resistance high-temperature oxidation resistance |
url |
https://www.mdpi.com/1996-1944/10/11/1248 |
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