期刊
WASTE AND BIOMASS VALORIZATION
卷 11, 期 7, 页码 3789-3799出版社
SPRINGER
DOI: 10.1007/s12649-019-00706-w
关键词
Rice husk ash; Si3N4; CVD; Wettability; Contact angle
Wettability of silica and coated silica by Al-Mg-Si alloys has been determined by the sessile-drop method. Great deal of effort was devoted to the characterization of metal/particulate interfaces. It has been offered that Mg in the Al-Mg-Si alloy vaporizes and reacts with CVD deposited Si3N4 on rice husk ash (silica) and forms Mg3N2 which is in contact with molten aluminum. By precipitation of Mg3N2 particles as an intermediate phase in the molten Al-Mg-Si the fraction of AIN is formed. Formation of AlN induces wetting between Al alloy and silica. Contact angle, work of adhesion and surface tension between the droplet and substrates have been measured for silica-Al-Mg-Si and Si3N4 coated silica-Al-Mg-Si systems. Results show that at 1200 degrees C, in nitrogen atmosphere with high Mg content in alloy, the minimum contact angles obtained in RHA and Si3N4-coated RHA substrates are 72 degrees and 35 degrees, respectively, revealing the beneficial effect of modifying the surface of RHA with Si3N4 coating.Graphical Abstract
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据