Preparation method of aluminum alloy composite material reinforced by filler particles

Abstract

The invention relates to the field of new materials and in particular relates to a preparation method of a filler particle enhanced aluminium alloy composite material. A cast aluminium alloy ZAlSi8MgBe is selected as a matrix alloy; filler particles include tetrapod-like zinc oxide whiskers, aramid fibers, glass fibers, nano titanium dioxide and silicon carbide, wherein the weights of tetrapod-like zinc oxide whiskers, aramid fibers, glass fiber, nano titanium dioxide and silicon carbide account for 6-8%, 4-5%, 3-4%, 1-2% and 2-3% of the mass of the cast aluminium alloy ZAlSi8MgBe, respectively; and all the filler particles are modified or pre-processed, and then stirred and cast with the matrix aluminium alloy, so that the filler particle enhanced aluminium alloy composite material is obtained. The aluminium alloy composite material prepared by using the preparation method disclosed by the invention is low in weight, high in specific strength and specific rigidity, low in coefficient of thermal expansion, and excellent in thermal conductivity and abrasive resistance, and further easy to prepare and low in cost; and the enhancement phase is dispersively distributed in the matrix and has isotropy; and therefore, the composite material is suitable for various complex stress states.

Description

technical field

[0001] The invention relates to the field of new composite materials, in particular to a method for preparing an aluminum alloy composite material reinforced by filling particles. Background technique

[0002] At present, the field of composite materials has been rapidly developed, and high-strength and high-modulus fibers such as carbon fibers, graphite fibers, and boron fibers have been developed successively. In the 1970s, aramid fibers and silicon carbide fibers appeared. These high-strength, high-modulus fibers can be combined with non-metallic matrices such as synthetic resins, carbon, graphite, ceramics, and rubber, or metal matrices such as aluminum, magnesium, and titanium to form composite materials with their own characteristics. The brake disc is an important part of the automobile braking system, and its braking performance is directly related to the driving safety of the vehicle. The surface temperature of cast iron brake discs widely used at ...