The present study aims to improve the hardness and wear resistance of aluminum-silicon alloys using atmospheric plasma-sprayed ZrO 2 , Al 2 O 3 -ZrO 2 multilayer and Al 2 O 3 /ZrO 2 composite coatings. The fabricated coatings were characterized to explore their morphological changes, surface hardness, phase composition, surface roughness, friction and wear. Friction and wear resistance against cast iron were determined under dry-sliding conditions at the load of 15 N in room temperature. The micro structural studies revealed the morphological changes of the various coatings fabricated on aluminum-silicon alloys. The Al 2 O 3 /ZrO 2 composite coating contained equiaxed grains due to differences in the melting points of the two particles. The formation of equiaxed grains increased the hardness of the aluminum-silicon alloy from 55 HV 0.3 to 1168 HV 0.3 after the deposit...

中文翻译：

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使用大气等离子喷涂ZrO 2，Al 2 O 3 -ZrO 2多层膜和Al 2 O 3 / ZrO 2复合涂层提高铝硅合金的硬度和耐磨性

本研究旨在通过使用大气等离子喷涂ZrO 2，Al 2 O 3 -ZrO 2多层膜和Al 2 O 3 / ZrO 2复合涂层来提高铝硅合金的硬度和耐磨性。对制成的涂层进行表征，以探索其形态变化，表面硬度，相组成，表面粗糙度，摩擦和磨损。在干式滑动条件下，在室温下以15 N的载荷测定对铸铁的摩擦和耐磨性。微观结构研究揭示了在铝硅合金上制造的各种涂层的形态变化。由于两个颗粒的熔点不同，Al 2 O 3 / ZrO 2复合涂层包含等轴晶。等轴晶粒的形成使铝硅合金的硬度从55 HV 0增加。