摘要
采用EB-PVD技术在镍基合金ReneN5基体表面沉积NiCrAlY粘结层,并对试样进行1000℃不同时间的恒温氧化处理,通过SEM、EDS、XRD研究了基体与粘接层界面元素互扩散行为和反应区的形成机制。结果表明:在1000℃条件下,NiCrAlY粘结层中的Al、Cr元素会向N5基体扩散,形成以β-NiAl和α-Cr相为主的互扩散反应区;而N5基体中的Ni元素则会向NiCrAlY粘结层扩散,形成以γ′-Ni_3Al相为主的二次反应区和以难熔金属为主的TCP相。
The NiCrAlY bond coatings were deposited on Ni-based superalloy (N5)by EB-PVD technique,and the sample was oxidized at constant temperature of 1000℃ for different time.Interdiffusion behavior of interface between substrate and bond coat,as well as the formation mechanism of reaction zone was analyzed by SEM,EDS and XRD.The result shows that the elements of AI and Cr in the NiCrAlY coating are diffused to the N5 substrate to form an interdiffusion reaction zone dominated by β-NiAl phase and α-Cr phase;and the Ni element in the N5 substrate is diffused to the NiCrAlY coatings,forming the secondary reaction zone composed of γ′-Ni3Al and TCP phase composed of refractory metal.
作者
刘林涛
李争显
陈云飞
彭易发
Liu Lintao;Li Zhengxian;Chen Yunfei;Peng Yifa(Xi'an University of Architecture and Technology,Xi'an 710055,China;Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China;Northeastern University,Shenyang 110819,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2019年第1期197-204,共8页
Rare Metal Materials and Engineering
基金
国家重点基础研究发展计划(2012CB625102)
青年科学基金(51501155)
关键词
热障涂层
界面互扩散
扩散阻挡层
thermal barrier coating
interface inter-diffusion
diffusion barrier
