Interfacial reaction in squeeze cast SiCw/AZ91 composites with different binders
来源期刊：中国有色金属学报(英文版)2001年第2期
论文作者：郑明毅 吴昆 姚忠凯 Tatsuo Sato Hiroyasu Tezuka Akihiko Kamio
文章页码：217 - 221
Key words：SiC whisker; magnesium alloy; composites; binder; interfacial reaction
Abstract: The whisker/matrix interfaces in squeeze cast SiCw/AZ91 composites with different binders (silica binder, acid aluminum phosphate binder and without binder), were studied by transmission electron microscopy (TEM) and high resolution electron microscopy (HREM). The SiCw／AZ91 interface is very clean in the composites with no binders. For the composites with acid aluminum phosphate binders or silica binders, there exists fine discrete interfacial reaction products MgO at the interface, and a definite orientation relationship between MgO and SiCw. The interfacial reaction products MgO is unevenly distributed at different parts of the composite ingot with silica binder, and mainly distributed to the interface at the side part of the composite cylinder. While in the SiCw/AZ91 composite with acid aluminum phosphate binder, MgO particles are distributed evenly at the interface in almost all the parts of the composite ingot.
