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

A technology of oriented alignment and composite materials, which is applied in the field of preparation of composite material sheets, can solve problems such as uniform dispersion, SiC nanowire breakage, and easy agglomeration of SiC nanowires, and achieve the effects of reducing damage, simple process, and solving extremely easy agglomeration

Active Publication Date: 2020-08-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems that SiC nanowires are seriously broken during the preparation process of the current layered composite material, and the SiC nanowires are easily agglomerated due to the high specific surface area of ​​the SiC nanowires, and it is difficult to disperse uniformly in the slurry. Preparation method of composite sheet of damaged and aligned SiC nanowires

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

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specific Embodiment approach 1

[0037] Specific Embodiment 1: In this embodiment, a method for preparing a composite sheet comprising low-damage and oriented SiC nanowires is carried out in the following steps:

[0038] 1. Weighing:

[0039] Weigh 1-15 parts of SiC nanowires, 20-50 parts of solvent, 0.01-0.5 parts of dispersant, 5-20 parts of plasticizer and 14.5-69.99 parts of binder as raw materials in parts by mass ;

[0040] 2. Pre-dispersion of SiC nanowires:

[0041] Put the SiC nanowires, solvent and dispersant weighed in step 1 into a ball mill container, and ultrasonically treat them for 1 to 30 minutes at an ultrasonic power of 200 to 400 W to obtain a pre-dispersed slurry of SiC nanowires; the volume of the ball mill container is 3 to 20 times the solvent volume;

[0042] 3. SiC nanowire low damage ball mill dispersion:

[0043] Add the plasticizer and binder weighed in step 1 into the ball mill container containing the SiC nanowire pre-dispersed slurry obtained in step 2, and then add ball mi...

specific Embodiment approach 2

[0054] Specific embodiment 2: This embodiment differs from specific embodiment 1 in that: the SiC nanowires described in step 1 are any combination of one or more of 3C, 2H, 4H, and 6H; the average diameter of the SiC nanowires 5-250 nm, and the length of SiC nanowires is 20-100 μm. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0055] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the solvent in Step 1 is a mixture of absolute ethanol and n-butanol in a mass ratio (0.5-1):1. Other steps and parameters are the same as those in Embodiment 1 or 2.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/14C08K7/00C08K3/34C08J5/18
CPCC08J5/18C08J2329/04C08K3/34C08K7/00C08K2201/011
Inventor 杨文澍赵旗旗李会伏捷瑞马一夫武高辉乔菁姜龙涛陈国钦张强康鹏超修子扬芶华松
Owner HARBIN INST OF TECH
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