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材料研究学报  2011, Vol. 25 Issue (5): 509-516    
  研究论文 本期目录 | 过刊浏览 |
hBN表面镀Ni对Ni--20Cr/hBN自润滑材料性能的影响
王常川, 王日初,  彭超群,  冯  艳, 韦小凤
中南大学材料科学与工程学院 长沙 410083
Effects of hBN Surface Plated Nickel on Properties of Ni-20Cr/hBN Self-lubricating Composites
WANG Changchuan, WANG Richu, PENG Chaoqun, FENG Yan, WEI Xiaofeng
School of Materials Science and Engineering, Central South University, Changsha 410083
引用本文:

王常川 王日初 彭超群 冯 艳 韦小凤. hBN表面镀Ni对Ni--20Cr/hBN自润滑材料性能的影响[J]. 材料研究学报, 2011, 25(5): 509-516.
, . Effects of hBN Surface Plated Nickel on Properties of Ni-20Cr/hBN Self-lubricating Composites[J]. Chin J Mater Res, 2011, 25(5): 509-516.

全文: PDF(1274 KB)  
摘要: 以六方BN(hBN)、NiCl2和NaCO3为原料, 采用沉淀法制备镀镍hBN粉末, 并采用粉末冶金法制备Ni--20Cr/hBN自润滑复合材料。研究了镀镍hBN粉末对Ni--20Cr/hBN复合材料密度、孔隙率、硬度、抗弯强度以及摩擦磨损性能的影响。结果表明: 固体润滑剂hBN表面镀Ni可提高Ni--20Cr/hBN复合材料的致密度和力学性能。其密度由5.43 g/cm3提高至5.68 g/cm3, 孔隙率由22.13%降低至18.55%, 抗弯强度由70.48 MPa提高至99.42 MPa, 硬度由18.82 HB提高至21.02 HB。采用镀镍hBN粉末制备的Ni--20Cr/hBN复合材料具有宽温带减摩性, 在常温和600℃下测试时, 摩擦系数变化不明显, 而在600℃时磨损率由462.18 mg/min降低至204.4 mg/min。
关键词 复合材料Ni--20Cr/hBN自润滑材料沉淀法摩擦磨损性能    
Abstract:Hexagonal boron nitride (hBN) powder was plated with nickel layer by the deposition process with the raw materials of hBN, NaCO3 and NiCl2. The Ni–20Cr/hBN self–lubricating composites were prepared by powder metallurgy with the hBN powder coated Ni and common hBN. The effects of hBN coated with Ni on density, porosity, hardness, strength and the tribological properties of the Ni–20Cr/hBN composites were studied. The results show that the Ni–20Cr/hBN composite with the hBN coated with Ni has better mechanical properties and lower porosities. The density, bending strength and hardnes increase and the porosity decreases. Besides, the composite with hBN coated with Ni has better anti-friction performance in a wide temperature region. At room temperature and 600oC, the friction coefficient changes less, while the wear rate decreases at 600 oC.
Key wordscomposites    Ni–20Cr/hBN    self–lubricating composites    deposition process    tribological properties
收稿日期: 2011-07-18     
ZTFLH: 

TG135

 
基金资助:

国家民口配套科研项目MKPT--03--182资助。

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