如果表面（尤其是塑料表面）用弹性模量相差≥20％的涂料至少涂覆2次,首先涂覆较硬（脆）的涂层,继之涂覆较软的弹性涂层,就可获得耐磨涂层。例如,将248.3 g甲基丙烯酰氧丙基三甲氧基硅烷、275 g 30％ SiO<sub>2</sub>纳米...如果表面（尤其是塑料表面）用弹性模量相差≥20％的涂料至少涂覆2次,首先涂覆较硬（脆）的涂层,继之涂覆较软的弹性涂层,就可获得耐磨涂层。例如,将248.3 g甲基丙烯酰氧丙基三甲氧基硅烷、275 g 30％ SiO<sub>2</sub>纳米粒子在异丙醇中的分散体（Highlink）和500 mL异丙醇组成的混合物,与27 g 0.1 mol展开更多
Multilayer ceramic coatings were fabricated on steel substrate using a combined technique of hot dipping aluminum(HDA) and plasma electrolytic oxidation(PEO). A triangle of normalized layer thickness was created for d...Multilayer ceramic coatings were fabricated on steel substrate using a combined technique of hot dipping aluminum(HDA) and plasma electrolytic oxidation(PEO). A triangle of normalized layer thickness was created for describing thickness ratios of HDA/PEO coatings. Then, the effect of thickness ratio on stresses field of HDA/PEO coatings subjected to uniform normal contact load was investigated by finite element method. Results show that the surface tensile stress is mainly affected by the thickness ratio of Al layer when the total thickness of coating is unchanged. With the increase of Al layer thickness, the surface tensile stress rises quickly. When Al2O3 layer thickness increases, surface tensile stress is diminished. Meanwhile, the maximum shear stress moves rapidly towards internal part of HDA/PEO coatings. Shear stress at the Al2O3 /Al interface is minimal when Al2O3 layer and Al layer have the same thickness.展开更多
文摘如果表面（尤其是塑料表面）用弹性模量相差≥20％的涂料至少涂覆2次,首先涂覆较硬（脆）的涂层,继之涂覆较软的弹性涂层,就可获得耐磨涂层。例如,将248.3 g甲基丙烯酰氧丙基三甲氧基硅烷、275 g 30％ SiO<sub>2</sub>纳米粒子在异丙醇中的分散体（Highlink）和500 mL异丙醇组成的混合物,与27 g 0.1 mol
基金Project(10572141) supported by the National Natural Science Foundation of China
文摘Multilayer ceramic coatings were fabricated on steel substrate using a combined technique of hot dipping aluminum(HDA) and plasma electrolytic oxidation(PEO). A triangle of normalized layer thickness was created for describing thickness ratios of HDA/PEO coatings. Then, the effect of thickness ratio on stresses field of HDA/PEO coatings subjected to uniform normal contact load was investigated by finite element method. Results show that the surface tensile stress is mainly affected by the thickness ratio of Al layer when the total thickness of coating is unchanged. With the increase of Al layer thickness, the surface tensile stress rises quickly. When Al2O3 layer thickness increases, surface tensile stress is diminished. Meanwhile, the maximum shear stress moves rapidly towards internal part of HDA/PEO coatings. Shear stress at the Al2O3 /Al interface is minimal when Al2O3 layer and Al layer have the same thickness.
