材料期刊网

COMPOSITION EFFECT ON DRY SLIDING WEAR BEHAVIORS OF Ti-B-N THIN FILMS

P.Sit

金属学报(英文版)

Friction and sliding wear behaviour of Ti-B-N coatings against AISI440C steel ball and WC-6wto ball were studied by using pin-on-disk tribometer along with microstructure characterization using optical microscopy (OM), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). It is shown that the wear resistance of film depended on the wear mechanism. In the case of AISI440C steel, adhesive wear were pre-dominant and the wear rate increased sharply to a maximum when N content reach -38at. This might be related to the change of film microstructure and phase configuration, so the least adhesive transfer of tribo-film was observed. If WC-6wt0o ball was used, less deformation wear debris was observed, this was responsible for the rise of wear rate. Despite of different wear modes, friction coefficients in both cases were found to depend mainly on the formation and the amount of h-BN phase. Elemental anal)sis by energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) revealed that oxygen participated in the wear behavior by reacting with films to form the debris comprised of various types of Ti oxide including TiO, TiO2 and Ti2O3, which increased wear resistance.

关键词: dry sliding wear , null , null

SiC含量对Al/SiC纳米复合材料干滑动磨损、腐蚀以及腐蚀磨损行为的影响

Sareh MOSLEH-SHIRAZI , Farshad AKHLAGHI , Dong-yang LI

中国有色金属学报(英文版) doi:10.1016/S1003-6326(16)64294-2

纳米复合材料的腐蚀、腐蚀磨损以及干摩擦磨损行为非常复杂，受化学、物理和机械等多方面因素影响。采用机械球磨、冷压和热挤压技术制备Al/SiC纳米复合材料，研究纳米SiC含量对材料硬度、干滑动磨损、腐蚀和腐蚀磨损行为的影响。采用电化学极化测试研究了复合材料在3% NaCl溶液中的抗腐蚀性能。采用盘-销装置研究了复合材料的干滑动磨损和在3%NaCl溶液中腐蚀磨损性能。利用扫描电子显微镜研究了材料及磨损表面的显微组织。结果表明，随着SiC含量的增加，纳米复合材料的干滑动摩擦和抗腐蚀性能均得到提高。由于溶液的润滑作用，使材料软化的摩擦因数和摩擦生热均降低。与基体合金相比，纳米复合材料的强度和抗腐蚀性能提高，因此其抗腐蚀磨损性能也提高。对于未增强的基体合金，其磨损机理为黏着磨损，而对于Al/SiC纳米复合材料，磨损机理转变为磨粒磨损。

关键词: 6061铝合金 , 碳化硅 , 纳米复合材料 , 机械球磨 , 腐蚀 , 干摩擦磨损 , 腐蚀磨损

COMPOSITION EFFECT ON DRY SLIDING WEAR BEHAVIORS OF Ti-B-N THIN FILMS

金属学报(英文版)

关键词:

Evaluation of Dry Sliding Wear Behaviour of Plasma Transferred Arc Hardfaced Stainless Steel

钢铁研究学报(英文版)

关键词:

流变铸造不同铁含量过共晶Al-Si合金在干摩擦条件下的磨损行为

林冲 , 吴树森 , 吕书林 , 曾劲彪 , 安萍

中国有色金属学报(英文版) doi:10.1016/S1003-6326(16)64156-0

研究铁含量对流变铸造过共晶Al?17Si?2Cu?1Ni合金在干摩擦条件下磨损行为的影响。磨损测试是在销?盘式摩擦磨损试验机上进行的。结果表明，在同等载荷下，流变铸造合金试样比传统重力金属型铸造试样的磨损率小。细小颗粒状δ-Al4(Fe,Mn)Si2相和多边形状α-Al15(Fe,Mn)3Si2相有助于提高流变铸造合金的耐磨性。随着细小富铁相体积分数的增加，流变铸造合金试样的磨损率减小。此外，随着载荷从50增大至200 N，流变铸造合金试样的磨损率增大。对于含3% Fe的流变铸造合金，在低载荷(50 N)时，磨损机制以氧化磨损为主；在高载荷时，磨损机制以氧化磨损和剥层磨损的联合作用为主。

关键词: 干摩擦 , 过共晶Al-Si合金 , 流变铸造 , 富铁相 , 磨损机理