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Method for preparing carbon fiber toughened zirconium boride-silicon carbide composite material by using slurry injection process

An injection process and composite material technology are applied in the field of preparing carbon fiber toughened ZrB2-SiC composite materials, which can solve the problems of easy damage of carbon fiber and difficulty in obtaining high density.

Active Publication Date: 2017-06-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the invention is to solve existing carbon fiber toughening ZrB 2 In order to solve the problem that it is difficult to obtain high density and carbon fiber is easy to be damaged in the preparation process of base ultra-high temperature ceramic materials, a method for preparing carbon fiber toughened zirconium boride-silicon carbide composite material by slurry injection process is provided.

Method used

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  • Method for preparing carbon fiber toughened zirconium boride-silicon carbide composite material by using slurry injection process
  • Method for preparing carbon fiber toughened zirconium boride-silicon carbide composite material by using slurry injection process

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specific Embodiment approach 1

[0021] Embodiment 1: This embodiment is a method for preparing carbon fiber toughened zirconium boride-silicon carbide composite material by slurry injection process, which is completed according to the following steps:

[0022] 1. Preparation of ZrB 2 -SiC ceramic paste: ZrB 2 Powder and SiC powder are mixed to get ZrB 2 Powder and SiC powder mixed powder; ZrB 2 Add the mixed powder of powder and SiC powder into absolute ethanol, then add dispersant, and then ball mill for 3h~5h at the ball milling speed of 150r / min~300r / min to obtain uniformly dispersed ZrB 2 - SiC ceramic paste;

[0023] ZrB as described in step 1 2 ZrB in mixed powder of powder and SiC powder 2 The volume fraction of the powder is 60% to 70%;

[0024] ZrB as described in step 1 2 The volume fraction of SiC powder in the mixed powder of powder and SiC powder is 30% to 40%;

[0025] Dispersant and ZrB described in step one 2 The mass ratio of the mixed powder of powder and SiC powder (0.01~0.02):1; ...

specific Embodiment approach 2

[0036]Specific embodiment two: the difference between this embodiment and specific embodiment one is: ZrB described in step one 2 The particle size of the powder is 100nm-200nm. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Embodiment 3: The difference between this embodiment and Embodiment 1 or Embodiment 2 is that the SiC powder in step 1 has a particle size of 400nm-600nm. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing a carbon fiber toughened zirconium boride-silicon carbide composite material by using a slurry injection process, relates to a method for preparing a carbon fiber toughened ZrB2-SiC composite material, and aims to solve the problems that a conventional carbon fiber toughened ZrB2-SiC composite material is hard to acquire high density and carbon fiber can be easily damaged in the preparation process. The method comprises the following steps: I, preparing uniformly dispersed ZrB20SiC ceramic slurry; II, toughening a ZrB2-SiC blank by using carbon fiber; and III, performing low-temperature hot-pressing sintering, thereby obtaining the carbon fiber toughened zirconium boride-silicon carbide composite material. The density of the carbon fiber toughened zirconium boride-silicon carbide composite material prepared by using the method is greater than 92%, the bending strength is greater than 220MPa, and the breaking tenacity is greater than 4MPa*m1 / 2. The invention discloses the method for carbon fiber toughened zirconium boride-silicon carbide composite material by using the slurry injection process.

Description

technical field [0001] The invention relates to a method for preparing carbon fiber toughened ZrB 2 - A method for SiC composites. Background technique [0002] ZrB 2 Ultra-high temperature ceramic composites have excellent high-temperature comprehensive properties, can be used for a long time (>2000s) in an oxidizing environment above 2000 °C and can maintain non-ablation and structural integrity, and are a promising ultra-high temperature Ablative heat-resistant materials have become important candidates or preferred materials for key components such as aircraft nose cones and wing leading edges, and key hot-end components in ultra-high temperature extreme service environments. However, ZrB 2 The low damage tolerance and poor thermal shock resistance of base ultra-high temperature ceramic materials have restricted the engineering application of this material. The use of traditional methods to improve the strength, toughness and thermal shock resistance of ultra-high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/645C04B35/80
CPCC04B35/58078C04B35/645C04B35/806C04B2235/3826C04B2235/5248C04B2235/77
Inventor 胡平张东洋程源方成张幸红
Owner HARBIN INST OF TECH
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