Effect of WS2 Inorganic Nanoparticles on AZ31 Mg alloy with Micro-arc Oxidation Ceramic Film

• Main Authors: Wei-Cheng Wang, 王偉成
• Other Authors: Song-Jeng Huang
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/8a99y4

碩士 === 國立臺灣科技大學 === 機械工程系 === 105 === Magnesium alloy has good mechanic properties and is considered the green material of the era. However, poor corrosion and wear properties limit its application. Micro-arc oxidation is one of the latest surface treatment technologies forming ceramic-like oxide coating on valve meta such as magnesium, aluminum, and titanium. This coating enhances anti-corrosion and wear ability remarkably. This study is focusing on the effects of various nanoparticles and the duration time in silicon electrolyte of MAO coatings and of AZ31 magnesium alloy when evaluated. The SEM, XRD, EDS, and polarization curve to exam and analyze the MAO surface morphologies, coating layer, and corrosion properties. Thickness and pore size of oxidation film increase as the duration extends. The mechanical properties enhanced when added nanoparticles into electrolyte bound with oxidation film and filled up pores on the surface. The results have shown that oxidation film with IF-WS2 has better mechanical properties (hardness), however, compared against oxidation film with Al2O3 nanoparticles it has poor anti-corrosion abilities. Thickness, surface appearance, density, structure and composition of the oxidation layer may affect its anti-corrosion ability.