Ti6Al4V钛合金表面Al2O3颗粒改性微弧氧化涂层制备及性能  

Preparation and Property of Modified Micro-arc Oxidation Coating Using Al2O3 Particles on Ti6Al4V

作　　者：李洪 宋智辉 唐鹏 Li Hong;Song Zhihui;Tang Peng(Key Lab of Guangdong for Modern Surface Engineering Technology,National Engineering Laboratory for Modern Materials Surface Engineering Technology,Guangdong Institute of New Materials,Guangzhou 510650,China;Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东省新材料研究所现代材料表面工程技术国家工程实验室广东省现代表面工程技术重点实验室,广东广州510650 [2]广东工业大学,广东广州510006

出　　处：《稀有金属材料与工程》2020年第3期755-760,共6页Rare Metal Materials and Engineering

基　　金：2017GDAS'Special Project of Science and Technology Development(2017GDASCX-0844,2017GDASCX-0111);2017GDAS'Academician Fund(2017GDASCX-0202)。

摘　　要：通过在磷酸盐电解液中加入Al2O3陶瓷颗粒,使得在Ti6Al4V钛合金表面的微弧氧化涂层结构和性能得到改性。涂层的结构和性能通过扫描电镜和XRD进行表征和测试,涂层的抗高温氧化性能和热震性能通过高温热循环氧化试验和热震试验进行测试。结果表明,通过在电解液中添加Al2O3陶瓷颗粒,涂层由Al2TiO5和TiO2组成,涂层更为致密,表现出更为优异的抗高温氧化和热震性能。电解液中游动的Al2O3陶瓷颗粒在微弧氧化过程中被吸入到样品表面并进入涂层,涂层的结构和性能得到改性。Micro-arc oxidation is a new surface treatment method, but the structure of the micro-arc oxidation coating is restricted by the electrolyte composition. The micro-arc oxidation coating on Ti6Al4V alloy was modified by adding micro-Al2O3 particles to a sodium phosphate solution. The coating structure and phase were characterized by scanning electron microscopy and X-ray diffraction, and the oxidation resistance and thermal shock properties of the coating were investigated. Results show that the modified coating is denser than the original coating, which is composed of Al2TiO5 and TiO2. The oxidation resistance and thermal shock property of the coating are improved with addition of Al2O3 particles in the electrolyte compared to those of the samples prepared without particles added in the electrolyte. Moving Al2 O3 particles are adsorbed on the coating surface and penetrate through it. As a result, the phase structure and properties of the original coating are modified.

关 键 词：TI6AL4V钛合金 微弧氧化 AL2O3颗粒 抗氧化性能 热震性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]