Formation of Intermetallic Compound in the Application of Semi-Solid Processing and its Mechanical Properties.

金属间化合物的热加工是困难的，因为它在高温下的高机械强度，但它似乎是可能的，通过半固态加工，在浆料状态下变形。研究了Al-（40 × 44）质量%Ni粉末混合物以不同加热速率加热时浆料的形成。浆料在比铝的熔点低的温度下形成，并且该温度随着较慢的加热速率而降低。Al-Ni合金从浆料中凝固后，其显微组织由Al_3Ni_2和Al_3Ni金属间化合物相以及共晶组织组成。具有金属间化合物成分的铝镍合金可在料浆状态下采用反挤压型压铸工艺进行热加工。由Al_3Ni_2和Al_3Ni金属间化合物相组成的Al-Ni合金在室温和高温下都具有很高的强度，经热处理后，由Al_3Ni_2和共晶相组成的合金组织转变为Al_3Ni_2和Al_3Ni金属间化合物相。

Hot working of intermetallic compound is difficult because of its high mechanical strength at high temperature, but it seems to be possible by the semi-solid processing that is deformed at the slurry state. This study was investigated on formation of the slurry when Al-(40〜44)mass %Ni powder mixture was heated with various heating rates. The slurry forms at low temperature than the melting point of aluminum and this temperature decreases with the slower heating rate. After solidification from the slurry, microstructure of the Al-Ni alloy is constituted of Al_3Ni_2 and Al_3Ni intermetallic phases and eutectic structure. The hot working of Al-Ni alloy with intermetallic composition can be accomplished by the die-casting of backward extrusion type under condition of the slurry state. Al-Ni alloys constituting of Al_3Ni_2 and Al_3Ni intermetallic phases is high strength in both of room and elevated temperatures and the structure of the alloy constituting of Al_3Ni_2 and eutectic structure became to Al_3Ni_2 and Al_3Ni intermetallic phases by the heat-treatment.