铜铝/聚苯酯涂层500~700℃的长时氧化行为研究  

Long-time Oxidation Behavior of Porous Aluminum Bronze Coatings at 500~700℃

作　　者：邹旸 张志远 杨谨赫 苗小峰 杜开平 皮自强 郑兆然 陈星 Zou Yang;Zhang Zhiyuan;Yang Jinhe;Miao Xiaofeng;Du Kaiping;Pi Ziqiang;Zheng Zhaoran;Chen Xing(AECC South Industry Co.,Ltd.,Zhuzhou 412002,China;BGRIMM Technology Group,Beijing 100160,China;BGRIMM Advanced Materials Science&Technology Co.,Ltd.,Beijing 102206,China)

机构地区：[1]中国航发南方工业有限公司,株洲412002 [2]矿冶科技集团有限公司,北京100160 [3]北矿新材科技有限公司,北京102206

出　　处：《热喷涂技术》2023年第4期52-59,共8页Thermal Spray Technology

基　　金：云南省材料基因工程二期项目(202302AB080020)。

摘　　要：铜铝/聚苯酯(CuAl/PHB)涂层是一种用于发动机气路封严的可磨耗涂层。以铜铝合金与铜铝/聚苯酯涂层为研究对象,采用试验与基于密度泛函理论的第一性原理计算相结合的方法,研究了不同Al元素含量、不同氧化温度和不同氧化时间对铜铝/聚苯酯涂层的影响,并表征不同温度下最高氧化时间达1000h的氧化产物,系统研究了合金与涂层的抗氧化性。结果表明,Cu7Al/PHB可磨耗封严涂层在620℃工况温度下可以达到抗氧化级(HB 5258-2000标准),但当温度达到650℃后抗氧化性已存在不足,建议应用于620℃以下的服役工况。Copper-aluminum/poly-p-hydroxybenzoate(CuAl/PHB)coating is an abradable coating used for engine airway sealing.In this paper,copper aluminum alloys and CuAl/PHB coatings were taken as research objects.The effects of different Al contents,different oxidation temperatures and different oxidation times on the CuAl/PHB coating are studied by combining experiments and first-principle calculations based on the density functional theory.The oxidation products with the highest oxidation time up to 1000 h at different temperatures are characterized.The results show that the Cu7Al/PHB abradable sealing coating can reach the antioxidant class(HB 5258-2000)at 620℃.When the temperature reaches 650℃,the antioxidant property is already insufficient.It is recommended to be applied to the service conditions below 620℃.

关 键 词：铜铝/聚苯酯 可磨耗封严涂层 氧化行为 第一性原理计算 

分 类 号：TG174.4[金属学及工艺—金属表面处理]