摘要
采用等离子喷涂技术制备了两种颗粒度的Al2O3-13%TiO2防滑涂层。采用扫描电镜(SEM)、X射线衍射仪(XRD)等对涂层的组织结构进行了表征,利用FW14往复摩擦试验机测定涂层的防滑性能,通过MMS-1G高速摩擦试验机评价了涂层摩擦学行为。结果表明,涂层致密度较高,两种涂层晶相都以γ-Al2O3为主并含有一定量非晶相;涂层防滑性能良好;两种涂层耐磨性能良好,低速时涂层失效形式以颗粒"拔出"为主,随着速度增加,层间裂纹扩展引起的层片剥落主导了涂层的磨损失效。
The Al2O3-13% TiO2non-skidding coatings made by two kinds of size feedstocks were deposited by air plasma spraying technology. The microstructure and properties of the coatings were characterized by means of scanning electron microscopy( SEM),X-ray diffraction( XRD),FW14 reciprocating tribometer and MMS-1G high speed tribometer. Results show that the dense microstructure is observed in both the coatings and the main phase is consist of γ-Al2O3and with some amorphous. Both of the coatings exhibit good antiskidding properties and excellent wear resistance through tribology tests. The primary wear mechanism of the coatings at the lower velocity is grain'pulled-out'and spalling wear aroused by the propagation of the interlamination crack becomes more dominant as the velocity increasing.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第5期171-175,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51175149)
河南省教育厅自然科学研究项目(2011A430012)
