镍基高温合金表面Al_2O_3活性扩散阻挡层的研究  

α-Al_2O_3 Active Diffusion Barriers in the Surface of Ni-Based Superalloy

作　　者：刘林涛[1] 李争显[1,2] 华云峰[2] 高杨[3] 杨晨曦[1] 

机构地区：[1]西安建筑科技大学,陕西西安710055 [2]西北有色金属研究院,陕西西安710016 [3]东北大学,辽宁沈阳110819

出　　处：《稀有金属材料与工程》2014年第11期2708-2712,共5页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展计划(2012CB625102)

摘　　要：采用EB-PVD在DD5镍基高温合金与Ni Cr Al涂层之间沉积Zr O2作为先驱层,并对试样分别进行600℃/4 h,700℃/4 h及900℃/4 h真空扩散处理,研究了扩散温度对α-Al2O3活性扩散阻挡层形成的影响,并且通过900℃/100 h恒温氧化处理对活性扩散阻挡层的高温服役性能进行了评价。结果表明:经过900℃/4 h真空扩散处理后,在Zr O2/Ni Cr Al界面形成一层连续致密的α-Al2O3扩散阻挡层,并且经过900℃/100 h大气恒温氧化后,α-Al2O3活性扩散阻挡层表现出良好的稳定性,以及优异的阻扩散能力。ZrO2 precursor layer was deposited between DD5 Ni-based superalloy and NiCrAlcoating by electron beam physical vapor deposition （EB-PVD）. Then the vacuum diffusion treatment of 600 ℃/4 h, 700 ℃/4 h and 900℃/4 h was carried out on the specimens of DD5/ZrOE/NiCrAI. The effects of diffusion temperature on the formation of α-Al2O3 active diffusion barriers were investigated. Meanwhile the high-temperature service properties of the a-A12O3 active diffusion barriers were evaluated by 900 ℃/100 h isothermal oxidation. Results show that after 900 ℃/4 h vacuum diffusion treatment a continuous dense a-Al2O3 active diffusion barrier is formed in the interface of ZrOE/NiCrA1. Furthermore, the a-Al2O3 active diffusion barrier exhibits good stability and excellent diffusion resistance after 900℃/100 h isothermal oxidation in air.

关 键 词：镍基高温合金 粘结层 活性扩散阻挡层 Α-AL2O3 

分 类 号：TG174.4[金属学及工艺—金属表面处理]