曹玉霞,黄传兵,杜令忠,张伟刚,兰叶.等离子喷涂 NiCr / Cr3 C2 -hBN 复合涂层的制备及摩擦性能研究[J].表面技术,2015,44(6):27-31.
CAO Yu-xia,HUANG Chuan-bing,DU Ling-zhong,ZHANG Wei-gang,LAN Ye.Preparation and Tribological Properties of Atmospheric Plasma-sprayed NiCr / Cr3C2-hBN Wear-resistant Coatings[J].Surface Technology,2015,44(6):27-31 |
| 等离子喷涂 NiCr / Cr3 C2 -hBN 复合涂层的制备及摩擦性能研究 |
| Preparation and Tribological Properties of Atmospheric Plasma-sprayed NiCr / Cr3C2-hBN Wear-resistant Coatings |
| 投稿时间：2015-01-24 修订日期：2015-06-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.06.006 |
| 中文关键词: NiCr/ Cr3C2-hBN 复合涂层 等离子喷涂 摩擦性能 |
| 英文关键词:NiCr / Cr3 C2 -hBN composite coating plasma spray tribological property |
| 基金项目:国家自然科学基金项目(51471159) ;河北省自然科学基金项目(E2015105068);唐山市科技计划项目(14130286a);唐山学院材料科学与工程重点学科(TSC2013003) |
|
|
| Author | Institution |
| CAO Yu-xia | Department of Environmental and Chemical Engineering, Tangshan College, Tangshan 063000, China |
| HUANG Chuan-bing | State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
| DU Ling-zhong | State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
| ZHANG Wei-gang | State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
| LAN Ye | Botian Environmental Group Limited by Share Ltd, Beijing 100082, China |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 加入 hBN 作为固体润滑剂,提高 NiCr/ Cr3C2 复合涂层的摩擦性能。 方法 采用化工冶金包覆、喷雾造粒和固相合金化技术制备 NiCr/ Cr3C2-10% hBN 复合粉体,再采用等离子喷涂技术制备复合涂层。 通过扫描电子显微镜(SEM)、X 射线衍射(XRD)和高温摩擦磨损试验等手段研究粉体和涂层的显微结构、物相组成以及室温至 800 ℃ 的摩擦磨损性能,探讨 NiCr/ Cr3C2-10% hBN 复合涂层在室温和400,800 ℃下的磨损机理。 结果 等离子喷涂 NiCr/ Cr3C2-10% hBN 复合涂层呈典型的层状结构,涂层结合强度可达 24 MPa,孔隙率为(8. 47±0. 5)% 。 涂层的摩擦系数和磨损率均随着温度的升高而先升高,后逐渐降低,400 ℃时最高,分别约为 0. 59 和 9. 2×10-4 mm3 / (N·m),800 ℃时分别降至 0. 45 和 4. 1×10-4mm3/ (N·m)。 高温下,hBN 润滑膜和金属氧化物的形成是摩擦系数和磨损率降低的主要原因。 室温下涂层的主要磨损机制是脆性断裂;400 ℃ 时,涂层的主要磨损机制是脆性断裂、塑形变形和轻微粘着磨损;800 ℃时,涂层的主要磨损机制是塑性变形、氧化、粘着磨损和涂层转℃至对偶件。 结论 等离子喷涂 NiCr/ Cr3C2-10% hBN 复合涂层在室温和高温下的润滑性能较好。 |
| 英文摘要: |
| Objective To improve the tribological properties of the NiCr / Cr3 C2 composite coatings by adding hBN into the coatings as lubrication. Methods The NiCr / Cr3 C2 -10% hBN composite powder was prepared by the technology of chemical and metallurgical coating, spray granulation and solid state alloying. The coating was prepared by atmospheric plasma-spray technology using the prepared powder. The microstructure, phase composition and tribological properties from room temperature to 800 ℃ of coating were studied by SEM, XED and high-temperature tribometer. The tribonlogical mechanism of the APS sprayed NiCr / Cr3 C2 -10% hBN composite coatings were investigated at room temperature, 400 ℃ and 800 ℃ . Results The NiCr / Cr3 C2 -10% hBN composite coatings consisted of elongated lamellae and the tensile strength of the coating was 24 MPa. The porosity of the coating was (8. 47± 0. 5)% . The friction coefficient and wear rate of the coating firstly increased and then decreased with the increasing of temperature. The friction coefficient and wear rate of the coating were 0. 59 and 9. 2×10 -4 mm3 / (N·m) at 400 ℃ , 0. 45 and 4. 1×10 -4 mm3/ (N·m) at 800 ℃ , respectively, which was due to the formation of hBN lubricant film and metallic oxide at high temperature. The abrasive mechanism of the NiCr / Cr3 C2 -10% hBN composite coatings was dominated by brittle crack at room temperature, mixed brittle crack, plastic deformation and mild adhensive wear at 400 ℃ , and it was characterized by plastic deformation, oxidation, adhesive wear and as well as coating transfer to the coupled pin at 800 ℃ . Conclusion The NiCr / Cr3 C2 -10% hBN composite coating exhibited excellent wear-resistant performance at both low and high temperature. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501715号