摘要
采用等离子喷涂技术在钛合金表面制备出六方氮化硼纳米片(BNNP)增强NiAl复合涂层。结果表明,涂层物相主要为原位生成的NiAl和少量AlO。相比于NiAl涂层,BNNP优异的力学性能和自润滑性能赋予复合涂层良好的减摩耐磨性能,其耐磨性能提高了约1.5倍。NiAl涂层的主要磨损机制是脆性断裂和三体磨粒磨损,BNNP/NiAl复合涂层的主要磨损机制则转变为轻微的磨粒磨损,且磨损表面BNNP润滑转移膜的形成有益于抑制对磨偶件的接触损伤。
Boron nitride nanoplatelet(BNNP) reinforced NiAl composite coatings were fabricated by using plasma spray. The results show that the main phases of the coating contain in-situ synthesized NiAl and trace amounts of AlO. Compared with monolithic NiAl coating, the BNNP/NiAl composite coating displays a good combination of improved wear resistance and relatively low coefficient of friction, especially the wear resistance of the composite is increased up to 1.5 times. The addition of BNNPs induces a change of the dominant wear mechanisms from brittle fracture and three-body abrasive wear associated with the monolithic NiAl coating to mild abrasive wear along with the BNNP/NiAl composite coating. Furthermore, the formation of BNNP tribolayer on the worn surface of the composite coating not only contributes to the self-lubrication function but also significantly suppresses contact damage of both the composite coating and its counterpart.
作者
娄旭耀
周波
宋英
陆小龙
Lou Xuyao;Zhou Bo;Song Ying;Lu Xiaolong(The Boiler and Pressure Vessel Safety Inspection Institute of Henan Province,Zhengzhou Henan 450016,China;Department of Mechanical Engineering,Changshu Institute of Technology,Changshu Jiangsu 215500,China;Schol of Mechanical and Electrical Engineering,Soochow University,Suzhou Jiangsu 215137,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第8期266-271,共6页
Heat Treatment of Metals
基金
河南省科技攻关项目(202102210190)。
