| Microstructure and high-temperature friction and wear behavior of WC-(W,Cr)2C-Ni coating prepared by high velocity oxy-fuel spraying | |
| Department | 固体润滑国家重点实验室 ; 先进润滑与防护材料研究发展中心 |
Hou GL(侯国梁) ; Zhou HD(周惠娣); An YL(安宇龙); Liu G(刘光); Chen JM(陈建敏); Chen J(陈杰)
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| 2011 | |
| Source Publication | Surface and Coatings Technology
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| ISSN | 0257-8972 |
| Volume | 206Pages:82-94 |
| Abstract | WC-(W,Cr)2C-Ni coatingwas prepared by high velocity oxy-fuel spraying (HVOF). Themicrostructure and phase composition of the as-sprayed coating and that after oxidation at high temperature were analyzed by means of scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The oxidation behavior of as-sprayed coating and starting powders was evaluated by thermogravimetry. Dry sliding friction and wear behavior of the WC-(W,Cr)2C-Ni coating sliding against Si3N4 ball at different temperatures (roomtemperature 20 °C and elevated temperature of 700 °C and 800 °C) was evaluated using an oscillating friction and wear tester. Besides, the microhardness and fracture toughness of the coating was also measured. Results show that sintering agglomeratedWC-20 wt.%Cr- 7 wt.%Ni powder is an effective method to prepare agglomerated and sintered WC-(W,Cr)2C-Ni composite powder. The excellent oxidation resistance ofWC-(W,Cr)2C-Ni coating ismainly resulted from a double-decker shell-coremicrostructure formed in the coating. The composition of the outer shell is (W,Cr)2C phase and that of the inner shell is Cr3C2. During high-temperature friction andwear test,well remained hardWC phase in theWC- (W,Cr)2C-Ni coating can guarantee its good mechanical properties and wear resistance, and newly generated nano NiWO4,CrWO4 and Cr2WO6 particles can further improve these properties significantly. |
| Keyword | Hvof Microstructure Wc-(w Oxidation Resistance Cr)2c-ni Coating Friction And Wear Behavior |
| Subject Area | 材料科学与物理化学 |
| Funding Organization | the National Natural Science Foundation of China (in the name of Innovative Group Fund,grant NO.50421502);the Ministry of Science and Technology of China (in the name of “973” Plan,grant NO.2007CB607601) |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 磨损和表面工程组 |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/823 |
| Collection | 固体润滑国家重点实验室（LSL） 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 |
| Corresponding Author | Zhou HD(周惠娣) |
| Recommended Citation GB/T 7714 | Hou GL,Zhou HD,An YL,et al. Microstructure and high-temperature friction and wear behavior of WC-(W,Cr)2C-Ni coating prepared by high velocity oxy-fuel spraying[J]. Surface and Coatings Technology,2011,206:82-94. |
| APA | 侯国梁,周惠娣,安宇龙,刘光,陈建敏,&陈杰.(2011).Microstructure and high-temperature friction and wear behavior of WC-(W,Cr)2C-Ni coating prepared by high velocity oxy-fuel spraying.Surface and Coatings Technology,206,82-94. |
| MLA | 侯国梁,et al."Microstructure and high-temperature friction and wear behavior of WC-(W,Cr)2C-Ni coating prepared by high velocity oxy-fuel spraying".Surface and Coatings Technology 206(2011):82-94. |
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