摘要
在铝酸钠体系中,利用微弧氧化双脉冲电源在Ti-6Al-4V合金表面制备了以Al2TiO5为主晶相的陶瓷层。试样分别在1000℃下空气和氩气气氛中进行焙烧,通过XRD和SEM技术分析了相组成与表面形貌。结果表明,在空气中,焙烧使微弧氧化陶瓷层中的Al2TiO5相分解较快。在氩气中,陶瓷膜外层生成α-Al2O3,膜层从外至内Al2O3含量降低并有Ti2O3生成。氩气焙烧后陶瓷层表面颗粒较焙烧前均匀和细化。
Compound ceramic coatings with the main crystalline of Al2 TiO5 were prepared on Ti-6Al-4V alloy by pulsed bi-polar micro-arc oxidation in NaAlO2 solution. The coated samples were calcined at 1 000 ℃ in argon and air respectively. The phase composition and surface morphology were investigated by XRD and SEM. The results show that Al2 TiO5 decomposed very quickly in air during the high temperature calcinations ,on the contrary ,Al2TiO5 decomposed very slowly in argon into α-Al2O3 on the coating surface ,the content ofα-Al2O3 is decreased from outside to inside layers and Ti2O3 is formed in the coating. The grains of coatings calcined in argon are smaller and more uniform than those of the untreated.
出处
《金属热处理》
CAS
CSCD
北大核心
2009年第8期28-30,共3页
Heat Treatment of Metals
基金
黑龙江省自然科学基金(E2007-36)
黑龙江省高等学校骨干教师科技创新项目计划(1055G055)
