Aluminum-based amorphous/high-entropy alloy composite and preparation method thereof

一种铝基非晶/高熵合金复合材料及制备方法

Abstract

The invention relates to an aluminum-based amorphous/high-entropy alloy composite and a preparation method thereof, belonging to the field of metal composites. The composite is relatively low in density and high in compressive strength and has certain deformability. The preparation method comprises the steps of placing metal powder of Al, Cu and Ti or Al, Fe and Ti or Al, Ni and Ti into a ball milling tank, injecting methylbenzene from a glove box with an Ar atmosphere to the ball milling tank, taking all the components out of the glove box after sealing the tank, and carrying out ball milling to obtain aluminum-based amorphous powder; preparing an original material from Al, Co, Cr, Fe and Ni metal blocks, and carrying out alloy smelting in vacuum by taking Ar as a protective gas to obtain a mother alloy ingot of AlCoCrFeNi high-entropy alloy; atomizing the obtained mother alloy ingot, and screening to obtain spherical high-entropy alloy powder with the particle size of 20-100mu m; and after carrying out ball milling and mixing on the obtained aluminum-based amorphous powder and the high-entropy alloy powder, placing the mixture into a hard alloy die to sinter to obtain the aluminum-based amorphous/high-entropy alloy composite.
本发明涉及一种铝基非晶/高熵合金复合材料及制备方法,属于金属复合材料领域。所述复合材料密度较低,抗压强度高,并具有一定的变形能力。所述方法步骤:将Al、Cu和Ti或Al、Fe和Ti或Al、Ni和Ti的金属粉末装入球磨罐,在Ar气氛的手套箱中向球磨罐中注入甲苯,封罐后从手套箱中取出,进行球磨,得到铝基非晶粉末;将Al、Co、Cr、Fe和Ni金属块体配成原始材料,在真空下,氩气作为保护气体,进行合金化熔炼,得到AlCoCrFeNi高熵合金的母合金锭;将得到的母合金锭进行雾化,筛选得到粒径为20~100μm的球形高熵合金粉末;将得到的铝基非晶合金粉末和高熵合金粉末进行球磨混合后,装入硬质合金模具中进行烧结,得到所述铝基非晶/高熵合金复合材料。

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