Direct-writing molded SiCw/SiC composite material and preparation method thereof

A composite material, direct writing technology, applied in the direction of additive processing, etc., can solve problems such as poor strength and toughness, and achieve the effect of short molding cycle, maintaining printing stability, and strong integrity
CN110330348AInactive Publication Date: 2019-10-15CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2019-10-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a direct-writing molded SiCw / SiC composite material and a preparation method thereof. The preparation method includes: adding PCS and SiCw into an organic solvent, adding an ester dispersant, and conducting ball milling for certain period of time to obtain a high whisker content, uniform and stable ink with certain viscoelasticity. According to a set procedure, a three-dimensional structure is printed out layer by layer on a substrate, and finally conducting curing and cracking to obtain the SiCw / SiC composite material. The method provided by the invention utilizes thevolatile organic solvent and stable cross-linking agent to realize the stable extrusion of a SiCw / PCS based organic slurry, and overcomes the disadvantages of easy nozzle blockage, poor continuity andunstable slurry in the molding process of previous direct-writing molded ceramic suspensions, especially high whisker content suspensions. The designed slurry has simple and reasonable composition, and strongly controllable rheological properties, and is convenient for large-scale industrial application. At the same time, the three-dimensional periodic structure prepared according to the invention has a wide range of scales, and the high strength and modulus of SiC whisker can be combined to prepare a 3D-SiCw / SiC based composite material with good strength and toughness.
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Description

Technical field

[0001] The invention belongs to the range of three-dimensional structure forming, and specifically relates to a direct writing forming SiC w / SiC composite material, especially relates to a high-content oriented silicon carbide whisker reinforced silicon carbide composite material and a preparation method thereof. Background technique

[0002] The high efficiency and low consumption of supersonic weapon systems and aerospace engines place higher requirements on the high-temperature mechanical properties, ablation resistance, and lightweight of materials. Fiber reinforced SiC (SiC f / SiC) composite material has high specific strength, high melting point, and excellent ablation resistance. If used in an engine, it can increase the operating temperature by 400~500℃ and reduce the weight by more than 50%. It is the next generation spacecraft heat-bearing component ( Such as flame tube, turbine guide vane, heat shield, vector nozzle adjustment piece, etc.) ideal materi...

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
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