摘要
为了提高火焰喷涂Al2O3基陶瓷涂层的致密度、结合强度和耐磨性,将铝热剂Al/CuO加入氧化铝钛粉(AT)陶瓷骨料中,采用自蔓延(SHS)反应火焰喷涂技术在AZ31B镁合金表面制备了Al2O3基复相陶瓷层,并对涂层的组织结构、致密度、抗热震性、结合强度和耐磨性进行了测试,分析了铝热剂对陶瓷层性能的影响。结果表明:与普通火焰喷涂制备的AT陶瓷层相比,SHS反应火焰喷涂制备的Al2O3基陶瓷层内部有Cu2+1O,Cu3TiO5,Al等新相生成,具有良好的致密度、结合强度和显微硬度,其耐磨性较普通火焰喷涂AT层提高较多。
Al/CuO thermite was introduced into alumina/titania(AT) ceramic aggregate to prepare alumina-matrix multiphase ceramic coating on the surface of AZ31B Mg alloy via self-propagating high-temperature synthesis(SHS) reaction flame spraying.The microstructure of the ceramic coating was observed,and its compactness,thermal shock resistance,bonding strength,and wear resistance were evaluated.Moreover,the effect of the thermite on the performance of the alumina-matrix multiphase ceramic coating was investigated.It was found that the alumina matrix coating prepared by SHS reaction flame spraying contained newly formed inner phases including Cu2+1O,Cu3 TiO5 and Al,and had higher compactness,bonding strength,microhardness as well as much better wear resistance than the counterpart obtained by conventional flame spraying.
出处
《材料保护》
CAS
CSCD
北大核心
2012年第4期58-59,69,共3页
Materials Protection
