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利用微弧氧化技术在6061铝合金表面原位生长ZrO2-Al2O3复合陶瓷涂层,通过SEM、XRD及纳米压痕仪对陶瓷涂层的微观结构、相组成、硬度及杨氏模量进行分析,并对其热震及高载荷耐磨性能进行研究。结果表明:陶瓷涂层由疏松层和致密层组成,其表面分布较多微孔;陶瓷涂层主要由t-ZrO2、γ-Al2O3和α-Al2O3相组成,其维氏硬度和杨氏模量分别为19.569和307.927GPa,约为6061铝合金的8倍和3倍;此外,陶瓷涂层还具有较高的抗热震性和耐磨性。
The microstructure, phase composition, hardness and Young’s modulus of the ceramic coating were analyzed by SEM, XRD and nanoindentation with the micro-arc oxidation technology to grow the ZrO2-Al2O3 composite ceramic coating on the surface of 6061 aluminum alloy. And its thermal shock and high load wear resistance research. The results show that the ceramic coating consists of porous layer and dense layer, and its surface is more microporous. The ceramic coating is mainly composed of t-ZrO2, γ-Al2O3 and α-Al2O3 phase. The Vickers hardness and Young’s modulus 19.569 and 307.927GPa, respectively, about 8 times and 3 times that of the 6061 aluminum alloy. In addition, the ceramic coating also has high thermal shock resistance and abrasion resistance.