A kind of composite material and preparation method thereof

Abstract

A composite material and a preparation method therefor. The composite material is applicable to housings of electronic devices and comprises a deformation resistant material layer (101) and an anodically oxidizable material layer (102), wherein the deformation resistant material layer (101) and the anodically oxidizable material layer (102) are metallurgically bonded or solid-phase bonded, and the thickness of the bonding area is less than or equal to 0.5 mm; the material of the deformation resistant material layer (101) has a yield strength of 300-1500 MPa and an elasticity modulus of 65-300 GPa; the material of the deformation resistant material layer (101) comprises at least one of an aluminum alloy material, an aluminum-based composite material, a stainless steel material, an alloy steel material, an amorphous alloy material, a magnesium alloy, or a magnesium-based composite material. The anodically oxidizable material layer on the surface of the composite material enables the composite material to be colored up by means of anodic oxidization, thereby forming effective, even, and abundant colors. In addition, the deformation resistant material layer enables the composite material to have high yield strength and high elasticity modulus, thereby ensuring that the composite material is not easily bent.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a composite material and a preparation method thereof. Background technique [0002] Today, with the rapid development of consumer electronic products, almost everyone owns a mobile phone as a daily necessities. In the process of choosing a mobile phone, the aesthetics of the mobile phone case has become one of the factors that consumers need to consider when purchasing a mobile phone. Beautiful decorative anodizing can be done. High-quality 5-series aluminum alloys and 6-series aluminum alloys not only have moderate strength, but more importantly, they can be made into uniform texture colors that consumers like, such as black, gray, natural color, rose gold, etc. [0003] However, the current mobile phone rear shells made of 5-series aluminum alloys or 6-series aluminum alloys still have the following problems. Due to the small elastic modulus and insufficient yield strength o...

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Problems solved by technology

[0003] However, the current mobile phone rear shells made of 5-series aluminum alloys or 6-series aluminum alloys still have the following problems. Due to the small elastic modulus and insufficient yield strength of 5-series aluminum alloys or 6-series aluminum alloys, consumers will suffer from It is found that the mobile phone will bend. In order to avoid the occurrence of bending results, it is necessary to use materials with higher yield strength and higher elastic modulus, such as aluminum alloy materials with high yield strength and higher elastic modulus or aluminum matrix composites. Materials (such as aluminum-based graphene composite materials, aluminum-based carbon nanotube composite materials, aluminum-based granular composite materials, etc.), although these materials have good yield strength and elastic modulus, due to the existence of alloying of high-strength aluminum alloys The degree is too high and there are heterogeneous materials such as graphene in aluminum matrix composite materials, so that these materials cannot be well anodized surface treatment, and it is difficult to form an effective and uniform color, thus limiting its application in consumer electronics such as mobile phones

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