摘要
采用微弧氧化技术,以7N01铝合金为基材,在铝酸盐体系电解液中制备出MAO陶瓷层,并研究了该涂层微观形貌及相关的生长规律。结果表明,涂层表面分布着大量火山口形态的放电孔洞,周围堆积覆盖着重新凝固的氧化物,以及由于内应力所引起的微裂纹。氧化初期陶瓷层生长速率较快,随氧化时间的延长,陶瓷层的厚度逐渐增加,当氧化时间超过30 min时,陶瓷层的生长速率降低。在恒压条件下,微弧氧化过程的电流密度均很快达到峰值再随陶瓷层厚度增加而下降。
The micro-arc oxidation ceramic coating was prepared on 7N01 aluminum alloy substrate with technology in the aluminates electrolyte system.The morphology and growth pattern of the ceramic coating were evaluated.The results show that lots of the discharge holes,like the crater shape,distribute on the surface of the coating.There are many re-solidification oxides accumulated and micro-cracks caused by internal stress.The ceramic coating growth rate is faster in initial oxide.With the increase of oxidation time,the thickness of the ceramic coating gradually increases.More than 30 min,the ceramic coating growth rate reduces.Under constant pressure conditions,the current density soon reaches a peak and declines with the increase of the ceramic coating thickness.
出处
《热加工工艺》
CSCD
北大核心
2012年第18期140-141,144,共3页
Hot Working Technology
关键词
7N01铝合金
微弧氧化
生长速率
微观形貌
7N01 aluminum alloy
micro-arc oxidation
growth rate
micro-morphology
