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An in-situ copolymerization precursor conversion method for preparing mc-sic ultra-high temperature ceramic materials

A technology for the transformation of ultra-high temperature ceramics and precursors, which is applied in the field of in-situ copolymerization precursor transformation for the preparation of MC-SiC ultra-high temperature ceramic materials, can solve the problems of inability to synthesize solubility and high low-temperature cross-linking activity, and achieves easy composition regulation, The effect of simplified process and simple preparation process

Active Publication Date: 2017-08-25
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an in-situ copolymerization precursor transformation method for preparing MC-SiC ultra-high temperature ceramic materials. Technical Problems with Precursors with High Low-Temperature Crosslinking Activity

Method used

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  • An in-situ copolymerization precursor conversion method for preparing mc-sic ultra-high temperature ceramic materials
  • An in-situ copolymerization precursor conversion method for preparing mc-sic ultra-high temperature ceramic materials
  • An in-situ copolymerization precursor conversion method for preparing mc-sic ultra-high temperature ceramic materials

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Experimental program
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Effect test

Embodiment 1

[0026] Divinyl zirconocene (molecular formula Cp 2 Zr(C 2 h 4 ) 2 ), trivinylsilane (molecular formula (C 2 h 4 ) 3 SiH) is used as the starting material, after the mold is repeatedly evacuated and filled with dry nitrogen for at least three times, divinylzirconocene, trivinylsilane and dicumyl peroxide DCP are mixed in proportion and injected into the mold; After the mold is filled, the mold is heated to 350°C and kept at this temperature for 10 hours for in-situ copolymerization, then heated to 1000°C and cooled to room temperature to obtain ZrC-SiC ultra-high temperature ceramic material, which is composed of ZrC 7.8 Si 1.1 .

Embodiment 2

[0028] Diallyl zirconocene (molecular formula Cp 2 Zr[(CH 2 )(C 2 h 4 )] 2 ), methyldivinylsilane (molecular formula (C 2 h 4 ) 2 (CH 3 ) SiH) as the starting raw material, vacuumize the mold repeatedly, fill dry nitrogen at least three times, mix diallyl zirconocene, methyl divinyl silane and dicumyl peroxide DCP, inject In the mold; after the mold is filled, the mold is heated to 150°C, and kept at this temperature for 2 hours for in-situ copolymerization, then heated to 1500°C, cooled to room temperature, and the ZrC-SiC ultra-high temperature ceramic material is obtained, the composition is ZrC 6.4 Si 0.6 .

Embodiment 3

[0030] Dibutenyl zirconocene (molecular formula Cp 2 Zr[(CH 2 ) 2 (C 2 h 4 )] 2 ), methyltrivinylsilane (molecular formula (C 2 h 4 ) 3 (CH 3 ) Si) as the starting material, after the mold was repeatedly evacuated and filled with dry nitrogen for at least three times, after mixing dibutenyl zirconocene, methyltrivinylsilane and dibenzoyl peroxide BPO, inject it into the mold ; After the mold is full, heat the mold to 240°C, and keep it warm at this temperature for 6 hours for in-situ copolymerization, then raise the temperature to 1350°C, and cool to room temperature to obtain ZrC-SiC ultra-high temperature ceramic material, which is composed of ZrC 9.2 Si 2.1 .

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Abstract

The invention provides an in-situ copolymerization precursor conversion method for preparing an MC-SiC ultrahigh-temperature ceramic material. Vinyl monomers with inorganic elements are mixed with vinyl silane monomers and initiator, in-situ copolymerization is conducted, precursors are prepared, and the required ceramic material is prepared by sintering the obtained precursors. The precursors obtained through the method have good performance and are simple in method and high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of ultra-high temperature ceramic materials, in particular to an in-situ copolymerization precursor conversion method for preparing MC-SiC ultra-high temperature ceramic materials. Background technique [0002] Ultra-High-Temperature Ceramics (UHTC) (Adv. Mater. Process, 2010, 168(6): 26-28.) refers to a ceramic material that can be used in an environment with a temperature ≥ 1800°C. The material can be used as key parts such as aircraft nose cone, wing leading edge, engine hot end, industrial high-temperature furnace wall and heat-resistant pipe, and can adapt to high Mach number long-duration flight, trans-atmospheric flight, rocket propulsion system and nose cone and Ultra-high temperature environments such as industrial high-temperature metal smelting are extremely potential ultra-high temperature materials. Composite ceramics such as ZrC-SiC and HfC-SiC not only have the ultra-high temperature resistan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/60C04B35/56C04B35/565C04B35/622
Inventor 邵长伟王军王浩王小宙
Owner NAT UNIV OF DEFENSE TECH
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