Unlock instant, AI-driven research and patent intelligence for your innovation.

Graphite/silicon carbide composite material and preparation method thereof

A technology of composite materials and silicon carbide, which is applied in the field of materials, can solve the problems of destroying the original shape of whisker materials and difficult to obtain high mechanical strength characteristics, and achieve the effects of excellent thermal shock resistance, high hardness and high elastic modulus

Active Publication Date: 2016-03-02
嘉兴皓特特种陶瓷股份有限公司
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the whisker material doping will destroy the original shape of the whisker material due to the traditional mixing methods such as grinding, mechanical mixing, etc., and it is difficult to obtain the characteristics of high mechanical strength.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Graphite/silicon carbide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The invention provides a kind of preparation method of graphite / silicon carbide composite material, it comprises the following steps:

[0024] S1, mixing magnesium borate whiskers, foaming agent and water in a foaming machine to obtain a foamy first mixture, wherein the weight portion of magnesium borate whiskers is 0.05 to 1.2, and the weight portion of foaming agent is 0.1~0.3, the weight part of water is 3~10;

[0025] S2, mixing graphite and silicon carbide to obtain a second mixture, wherein the weight ratio of graphite to silicon carbide is 1:(1-5);

[0026] S3, uniformly mixing the first mixture and the second mixture to obtain a third mixture, wherein the weight part of the second mixture is 10;

[0027] S4, performing press molding on the third mixture, and sintering at high temperature to obtain the graphite / silicon carbide composite material.

[0028] In step S1, the time for mixing the magnesium borate whiskers, foaming agent and water in the foaming machi...

Embodiment 1

[0038] This embodiment uses high-purity raw materials.

[0039] 0.2 parts by weight of magnesium borate whiskers, 0.2 parts by weight of sodium dodecylbenzenesulfonate and 5 parts by weight of water were mixed in a foaming machine to form a foamy first mixture. Graphite and silicon carbide were mixed in a weight ratio of 1:1 to obtain a second mixture. Mix the first mixture and 10 parts by weight of the second mixture uniformly to obtain a third mixture. After the mixing is completed, the third mixture is press-molded under a pressure of 80 MPa and sintered at a high temperature of 1200 degrees Celsius to obtain the graphite / silicon carbide composite material.

[0040] The obtained graphite / silicon carbide composite material is subjected to a mechanical performance test, and the obtained test results are shown in figure 1 .

Embodiment 2

[0042] This preparation method is basically consistent with the preparation method of Example 1, except that 0.4 parts by weight of magnesium borate whiskers are used.

[0043] The obtained graphite / silicon carbide composite material is subjected to a mechanical performance test, and the obtained test results are shown in figure 1 .

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
Login to View More

PUM

PropertyMeasurementUnit
flexural strengthaaaaaaaaaa
aspect ratioaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method for a graphite / silicon carbide composite material. The preparation method comprises the following steps: (1) mixing 0.05-1.2 parts by weight of magnesium borate whisker, 0.1-0.3 part by weight of a foaming agent and 3-10 parts by weight of water in a foaming machine to obtain foamed first mixture; (2) mixing graphite and silicon carbide to obtain a second mixture, wherein the weight ratio of graphite to silicon carbide is 1:(1-5); (3) uniformly mixing the first mixture and the second mixture to obtain a third mixture, wherein the weight fraction of the second mixture is 10 parts; and (4) performing pressurization molding on the third mixture, and performing high-temperature sintering, so as to obtain the graphite / silicon carbide composite material. The invention also provides the graphite / silicon carbide composite material prepared by employing the above preparation method.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a graphite / silicon carbide composite material and a preparation method thereof. Background technique [0002] Graphite / silicon carbide composite materials are widely used in non-ferrous metal smelting and other fields. In order to improve the performance and applicable fields of materials, people are constantly improving the mechanical properties of graphite / silicon carbide composites at high temperatures through various methods, mainly strength and thermal shock resistance. However, since both graphite and silicon carbide are barren materials, it is difficult to obtain excellent thermal shock resistance and high strength for such composite materials. [0003] Whisker is a short fiber single crystal material with a diameter of nanometer to micrometer and high orientation. It has few chemical impurities in the crystal, no grain boundaries, few crystal structure defects, uniform...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/81C04B35/565C04B35/528
Inventor 龚文杨勇
Owner 嘉兴皓特特种陶瓷股份有限公司