微观组织结构对NiCrAlY涂层抗高温氧化性能的影响  

Effects of Microstructure on High Temperature Oxidation Resistance of NiCrAlY Coatings

作　　者：杨德明[1] 高阳[1] 周起帆 蔡林 

机构地区：[1]大连海事大学热喷涂研究中心,辽宁大连116026

出　　处：《中国表面工程》2017年第5期119-125,共7页China Surface Engineering

基　　金：辽宁省自然科学基金(20170540084);中央高校基本科研业务费专项资金(3132017024)~~

摘　　要：利用低压等离子喷涂(LPPS)和超音速火焰喷涂(HVOF)分别制备出具有两种典型组织的Ni Cr Al Y涂层,分别为层片状组织和粉末颗粒堆积结构。两种涂层的耐高温氧化性能试验在空气条件下进行,1 100℃分别保温5、10和20 h,以及在1 200℃和1 300℃分别保温10 h。结果表明,在1 100℃等温氧化条件下,层片状结构的LPPS涂层的抗高温性能优于颗粒堆积结构的HVOF涂层,并且随着保温时间的增加,氧化增重呈现抛物线形式增长。在1 200℃和1 300℃变温氧化过程中,颗粒堆积结构的HVOF涂层的抗高温氧化性能高于LPPS涂层。Two types of NiCrAlY coatings with lamellar and particle accumulated microstructure were deposited by low pressure plasma spraying （LPPS） and high velocity oxy fuel spraying （HVOF）, respectively. Oxidation of as-sprayed coatings of each type was carried out in air at 1 100 ℃ for 5, 10, 20 h, as well as 1 200 ℃ and 1 300 ℃ for 10 h. The results show that the LPPS coating with lamellar microstrucmre shows better oxidation resistance in the isothermal oxidation condition at 1 100 ℃. With the increase of the holding time, the oxidation weight gain gradually decreases, which is similar to a parabola type. In the oxidation process at 1 200 ℃ and 1 300 ℃, the high temperature oxidation resistance of the HVOF coating with particle accumulated microstructure is much better than that of the LPPS coating.

关 键 词：低压等离子喷涂 超音速火焰喷涂 NICRALY 抗高温氧化 

分 类 号：TG174.442[金属学及工艺—金属表面处理]