| Effect of alumina dispersion on oxidation behavior as well as friction and wear behavior of HVOF-sprayed CoCrAlYTaCSi coating at elevated temperature up to 1000 °C | |
| Department | 先进润滑与防护材料研究发展中心 |
Hou GL(侯国梁) ; An YL(安宇龙); Zhao XQ(赵晓琴); Zhou HD(周惠娣); Chen JM(陈建敏); Hou GL(侯国梁); An YL(安宇龙); Chen JM(陈建敏)
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| The second department | 固体润滑国家重点实验室 |
| 2015 | |
| Source Publication | Acta Materialia
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| ISSN | 1359-6454 |
| Volume | 95Pages:164-175 |
| Abstract | CoCrAlYTaCSi alloy coating and CoCrAlYTaCSi Al2O3 composite coating were prepared on Inconel 718 alloy substrate by high velocity oxy-fuel (HVOF) spraying in order to avoid the failure of the hot parts made of the Ni-based alloy induced by oxidation and wear damage at elevated temperature of up to 1000 °C, with which the agglomerated powder of CoCrAlYTaCSi and Al2O3 was sintered to afford the to-be-sprayed CoCrAlYTaCSiAl2O3 powder. The microstructure and phase composition of the as-sprayed coatings were analyzed by scanning electron microscopy, transmission electron microscopy and X-ray diffraction, and their mechanical properties were determined with a Vicker’s hardness tester and a nano-indentation tester. Furthermore, the oxidation behavior of the coatings was evaluated by thermogravimetry and oxidation test in muffle furnace, and their friction and wear behavior under dry sliding against Si3N4 ball from room temperature to 1000 °C was evaluated with a high temperature tribometer. Results show that Ta, C and Si elements mainly exist in the forms of TaC and SiC nano-particles in as-sprayed coatings. The incorporation of Al2O3 dispersion results in a significant increase in the hardness, modulus, contact stiffness and wear resistance, but metallic Co and Cr slightly reduce the oxidation resistance of CoCrAlYTaCSi coating. Particularly, as-fabricated CoCrAlYTaCSiAl2O3 coating exhibits much better wear resistance than CoCrAlYTaCSi coating and other MCrAlY/oxide metal-matrix coatings prepared by HVOF or other technologies, showing promising potential as a protective coating of Ni-alloy based hot parts. |
| Keyword | Hvof Spraying Cocralytacsi-al2o3 Coating Oxidation Resistance High-temperature Friction And Wear Behavior |
| Subject Area | 材料科学与物理化学 |
| DOI | 10.1016/j.actamat.2015.05.025 |
| Funding Organization | the National Natural Science Foundations of China (Grant Nos. 51441005;51302272) |
| Indexed By | SCI |
| If | 4.465 |
| Language | 英语 |
| Funding Project | 磨损与表面工程课题组 |
| compositor | 第一作者单位 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/18524 |
| Collection | 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 固体润滑国家重点实验室（LSL） |
| Corresponding Author | Hou GL(侯国梁); An YL(安宇龙); Chen JM(陈建敏) |
| Affiliation | Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China |
| Recommended Citation GB/T 7714 | Hou GL,An YL,Zhao XQ,et al. Effect of alumina dispersion on oxidation behavior as well as friction and wear behavior of HVOF-sprayed CoCrAlYTaCSi coating at elevated temperature up to 1000 °C[J]. Acta Materialia,2015,95:164-175. |
| APA | Hou GL.,An YL.,Zhao XQ.,Zhou HD.,Chen JM.,...&陈建敏.(2015).Effect of alumina dispersion on oxidation behavior as well as friction and wear behavior of HVOF-sprayed CoCrAlYTaCSi coating at elevated temperature up to 1000 °C.Acta Materialia,95,164-175. |
| MLA | Hou GL,et al."Effect of alumina dispersion on oxidation behavior as well as friction and wear behavior of HVOF-sprayed CoCrAlYTaCSi coating at elevated temperature up to 1000 °C".Acta Materialia 95(2015):164-175. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2015164-175.pdf（6181KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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