A method for preparing a composite sheet comprising low-damage and aligned SIC nanowires

Abstract

The invention provides a preparation method of a composite material thin sheet containing low-damage and orientation-arrangement SiC nanowires, and relates to a preparation method of thin sheet of SiCnanowires. The method solves the problems that in the preparation process of the existing laminar composite material, the SiC nanowire fracture is serious, and due to the high specific surface area of the SiC nanowires, the SiC nanowire can be easily agglomerated and cannot be easily and uniformly dispersed in slurry. The method comprises the steps of 1, material weighing; 2, SiC nanowire pre-dispersion; 3, SiC nanowire low-damage ball milling dispersion; 4, gas removal treatment; 5, tape casting; 6, drying. The invention provides the method for preparing the thin sheet of the low-damage andorientation-arrangement SiC nanowires; the method process is simple; the SiC nanowires are arranged along the tape casting direction; the problem that the SiC nanowire can be easily agglomerated can be solved; the damage to the SiC nanowires is small. The method is suitable for preparing the SiC nanowire thin sheet.

Description

technical field

[0001] The invention relates to a preparation method of a composite material sheet. Background technique

[0002] SiC nanowires have the characteristics of high strength, high modulus, and high toughness, and are a good composite material reinforcement. However, as a material with a large aspect ratio, SiC nanowires have anisotropic properties. Reinforcement works best when it is directional. At present, the method of realizing SiC alignment is mainly to use an external stress field or other physical fields in a medium with a certain deformation capacity, so as to realize the deflection of SiC nanowires. It has been reported in the literature that the SiC nanowires are oriented along the extrusion direction in the aluminum matrix through hot extrusion treatment and shear stress; the tensile strength of the composite material obtained after the oriented arrangement treatment is increased by about 60%. However, due to the relatively large long diameter of SiC...

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