对镍基高温合金上激光重熔等离子喷涂热障涂层进行研究,并对其高温性能进行了测试.结果表明,ZrO2陶瓷涂层为细化柱状晶,柱状晶晶界处含Al、Ti等元素,NiCoCrAlY结合层为奥氏体胞晶.相分析确定形成了立方和四方混合ZrO2.其高温氧化和热循环性能比等离子喷涂形成的热障涂层显著提高
A new type of thermal barrier coating is being developed for aircraft gas turbine blades by laser cladding on superalloy substrates. During rapid melting and solidification in laser processing, an oriented epitaxial growth, closely packed columnar structu
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