The experimental results show that, the composite coatings have higher hardness and wear resistance.
实验结果表明，复合镀层具有较高的硬度和耐磨性。
Compared with conventional metallic materials, advanced ceramics have higher melting point, higher hardness, lower density, better anticorrosion property and wear resistance, etc.
陶瓷材料具有熔点高、硬度高、密度小、耐腐蚀、抗氧化等诸多优点，在冶金、化工、机械、宇航等领域已得到较多应用。
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