A rapid preparation method of superhard and lightweight diamond-b4c-sic ternary composite ceramics

A ternary composite, -b4c-sic technology, which is applied in the field of lightweight ceramic materials, can solve the problems of limiting final application, long sintering time, and high energy consumption, and achieves simple preparation methods and technological processes, excellent mechanical properties, and preparation costs. low effect
CN112159231BActive Publication Date: 2021-06-01WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2021-06-01

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Abstract

The invention provides a rapid preparation method of ultra-hard light diamond-B4C-SiC ternary composite ceramics, comprising the following steps: selection of raw material powder; preparation of ternary mixed powder; rapid sintering of powder in situ reaction; Subsequent processing of the sample, the prepared superhard lightweight diamond‑B 4 B in C‑SiC ternary composite ceramics 4 The C‑SiC ceramic phase accounts for 70‑82%, and the diamond phase accounts for 18‑30%. In the present invention, diamond, boron powder and silicon powder are used as raw materials, and the ternary mixed powder is equipped with in-situ reaction and rapid sintering under the conditions of high heating rate and short holding time, which reduces the sintering temperature of ceramic densification, and effectively Inhibits the graphitization of diamond; at the same time, the liquid phase formed by silicon during sintering accelerates the reaction and promotes the densification of ternary composite ceramics; the preparation cost is low, the production cycle is short, and the diamond particles in the product are evenly dispersed in B 4 Between C and SiC ceramics, there is no graphite residue and the structure is dense, and it has the characteristics of ultra-high hardness, high strength, high toughness and light weight.
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Description

Technical field

[0001] The present invention relates to the technical field of lightweight ceramic materials, and more particularly to a rapid preparation method of superhal and light diamond-B4C-SiC ternate composite ceramics.Background technique

[0002] Ultra-hard wear-resistant materials have important engineering application background. At present, the main wear-resistant materials include silicon carbide (SiC), boronized boron (B4C), boron, titanium (Tib2), Aluminum dioxide (Al2O3), But how to further increase material wear resistance, still need to solve problems.

[0003] Diamonds have their own unique crystal structures, with higher hardness, strength, and elastic modulus than ceramic, is an ideal addition phase of the ceramic material hardness, and the high-elastic modulus of diamond makes it undertaken when composite Larger loads, due to their high hardness, strength characteristics, enhance the overall strength and hardness of the composite material. At present, the main preparati...

Claims

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