High-volume-fraction ceramic-metal layered composite material and preparation method thereof

A metal composite material and a composite material technology, which are applied in the field of high-volume ceramic-metal layered composite materials and their preparation, can solve the problems of disorder, structure containing residual pores, and high metal phase content, so as to improve performance, eliminate The effect of porosity defect, good toughening effect
CN107326211AActive Publication Date: 2017-11-07JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JILIN UNIV
Publication Date
2017-11-07

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Abstract

The invention relates to a high-volume-fraction ceramic-metal layered composite material. The volume fraction of ceramics reaches 70-90 vol.%, and the ceramics are of high directional layered parallel structures; ceramic layers are connected through a metal ligament bridge; the thickness of the ceramic layer is 20-80 [mu]m, and the thickness of the metal ligament bridge is 5-10 [mu]m. According to the high-volume-fraction ceramic-metal layered composite material and a preparation method thereof, a layered porous ceramic skeleton is made by the double-temperature gradient freezing casting process, the whole (three-dimensional) layered structures are regular and are arranged in parallel; excess metal phase in the layered composite material is pressed out by utilizing the hot pressing process, so that the layered ceramic-metal composite material with the ceramic volume fraction being up to 70-90 vol.% is successfully prepared and is closer to the composition ratio of a shell pearl layer; the ceramic layers which are stem grafting are broken into separated layer pieces by utilizing the hot pressing process, the excess metal phase is squeezed into the gap between these separated ceramic layers, a brick-mud structure which is very similar to the shell pearl layer is formed, and the strengthening and toughening effect is better.
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Description

technical field

[0001] The invention relates to a high-volume ceramic-metal layered composite material and a preparation method thereof, belonging to the technical field of composite materials. Background technique

[0002] Natural biomaterials are usually composed of simple raw material components such as minerals and organic matter in nature, but their complex multi-scale hierarchical assembly structure endows them with excellent mechanical properties and the best adaptability to the living environment. A typical example of this is seashells. Pearl oyster is composed of about 95vol.% brittle aragonite (mainly composed of CaCO 3 ) and about 5vol.% of organic matter, but its fracture toughness is more than 3000 times that of natural aragonite, which is mainly due to the multi-scale and multi-level "brick-mud" layered structure formed by the alternate layering of aragonite and organic matter . The toughness mechanism of pearl oyster provides inspiration for overcoming the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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