Microstructure and Tribological Properties of Plasma Sprayed NiCr/Cr(3)C(2) and NiCr/Cr(3)C(2)-BaF(2)center dot CaF(2) Composite Coatings
文献类型：会议论文
| 作者 | Huang, C. B.; Du, L. Z.; Zhang, W. G. |
| 出版日期 | 2009 |
| 会议名称 | 5th China International Symposium on Tribology/1st International Tribology Symposium of IFToMM |
| 会议日期 | SEP 24-27, 2008 |
| 会议地点 | Beijing, PEOPLES R CHINA |
| 关键词 | Plasma spray Self-lubricant coating Microstructure Tribological properties HIGH-TEMPERATURE CR3C2-NICR COATINGS WEAR BEHAVIOR IMPROVEMENT OXIDATION |
| 页码 | 669-675 |
| 中文摘要 | NiCr alloy coated BaF(2)center dot CaF(2) eutectic and Cr(3)C(2) powders (NiCr/Cr(3)C(2) and NiCr/BaF(2)center dot CaF(2)) are prepared by pressurized hydrogen reduction and solid state alloying process. NiCr/Cr(3)C(2) and NiCr/Cr(3)C(2)-BaF(2)center dot CaF(2) coatings are fabricated by atmospheric plasma spray technology. Both the coatings exhibit low porosity, high micro-hardness and high cohesive strength. Compared with NiCr/Cr(3)C(2) coating, the NiCr/Cr(3)C(2)-BaF(2)center dot CaF(2) coating shows much more superior wear resistance and noticeably lower friction coefficient under dry sliding wear test conditions at high temperature. The friction coefficient of both two coatings are high (mu=0.7-0.8) at room temperature, and decreases with the increase of load. However, the friction coefficient of NiCr/Cr(3)C(2)-BaF(2)center dot CaF(2) coating reduces to 0.38 +/- 0.03 when temperature is up to 500 degrees C, which is significantly lower than NiCr/Cr(3)C(2) coating (mu=0.62 +/- 0.02). Brittle fracture and delamination are the dominant wear mechanisms of the two coatings at low temperature. BaF(2)center dot CaF(2) eutectic, acting as a solid lubricant above 500 degrees C, obtains a much lower shear strength to effectively reduce friction and wear rate of both coating and coupled Si(3)N(4) balls by forming a lubricating film in the wear track. |
| 收录类别 | ISTP |
| 会议网址 | |
| 会议录 | ADVANCED TRIBOLOGY Pages: 669-675
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| 会议录出版者 | Tsinghua University Press |
| 语种 | 英语 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/11128]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 推荐引用方式 GB/T 7714 |
Huang, C. B.,Du, L. Z.,Zhang, W. G.. Microstructure and Tribological Properties of Plasma Sprayed NiCr/Cr(3)C(2) and NiCr/Cr(3)C(2)-BaF(2)center dot CaF(2) Composite Coatings[C]. 见:5th China International Symposium on Tribology/1st International Tribology Symposium of IFToMM. Beijing, PEOPLES R CHINA. SEP 24-27, 2008. |
入库方式： OAI收割
来源：过程工程研究所
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