The Compound casting method was used to produce an Al/Ni bimetal composite. The mechanisms of formation of the reinforcing intermetallic phases were studied and the produced bimetal composite’s microstructure was then characterized. The results showed that the Al/Ni interface consisted of two intermetallic layers including Al3Ni2 and Al3Ni. It is suggested that the Al3Ni reinforcing particles of the composite originated from two sources. (1) Some Al3Ni particles detached from the Al3Ni layer formed at the interface between the Ni core and the Al melt and dispersed in the liquid Al and (2) Al-Al3Ni eutectic phase, which formed during the solidification process. The increase in the temperature led to the formation of more reinforcing particles and extended the depth of dispersion of the particles in the Al matrix.

中文翻译：

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复合铸造Al/Al3Ni原位复合材料的形成机制及组织表征

复合铸造法用于生产铝/镍双金属复合材料。研究了增强金属间相的形成机制，然后表征了制备的双金属复合材料的微观结构。结果表明，Al/Ni界面由Al3Ni2和Al3Ni两个金属间层组成。这表明复合材料的 Al3Ni 增强颗粒有两个来源。(1) 一些 Al3Ni 颗粒从 Ni 核和 Al 熔体界面形成的 Al3Ni 层脱离并分散在液态 Al 中；(2) 在凝固过程中形成的 Al-Al3Ni 共晶相。温度的升高导致更多增强颗粒的形成并扩大了颗粒在铝基体中的分散深度。