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a nb‑ti‑zrb 2 ‑sic composite material and its preparation method

A nb-ti-zrb2-sic, composite material technology, applied in the field of composite material preparation, can solve the problem of low room temperature fracture toughness, achieve good room temperature toughness, improve fracture toughness, and improve high temperature strength

Active Publication Date: 2017-12-26
XIAN AEROSPACE XINYU ELECTRICAL & MECHANICAL EQUIP FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of novel Nb-Ti-ZrB 2 -SiC composite material, which solves the technical problem of low room temperature fracture toughness of existing refractory metals and their alloy materials

Method used

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  • a nb‑ti‑zrb <sub>2</sub> ‑sic composite material and its preparation method

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Embodiment 1

[0022] In this embodiment Nb-Ti-ZrB 2 -SiC composite material is composed of the following substances in mass percentage: Ti 10%, ZrB 2 20%, SiC 10%, the balance being Nb and unavoidable impurities.

[0023] The present embodiment prepares described Nb-Ti-ZrB 2 - The method for SiC composites comprises the following steps:

[0024] Step 1. Put titanium powder, zirconium boride powder, silicon carbide powder and niobium powder in a ball mill, mix them evenly by means of wet ball milling, then dry them under vacuum conditions, and pulverize them to obtain mixed powders; preferably Specifically, the mass purity of the titanium powder is not less than 99%, the mass purity of the zirconium boride powder is not less than 99%, the mass purity of the silicon carbide powder is not less than 99%, and the mass purity of the niobium powder is not less than 99%. %, the particle size of the titanium powder is not greater than 5 μm, the particle size of the zirconium boride is not greater...

Embodiment 2

[0029] In this embodiment Nb-Ti-ZrB 2 -SiC composite material is composed of the following substances in mass percentage: Ti 8%, ZrB 2 15%, SiC 6%, the balance being Nb and unavoidable impurities.

[0030] The present embodiment prepares described Nb-Ti-ZrB 2 - The method for SiC composites comprises the following steps:

[0031] Step 1. Put titanium powder, zirconium boride powder, silicon carbide powder and niobium powder in a ball mill, mix them evenly by means of wet ball milling, then dry them under vacuum conditions, and pulverize them to obtain mixed powders; preferably Specifically, the mass purity of the titanium powder is not less than 99%, the mass purity of the zirconium boride powder is not less than 99%, the mass purity of the silicon carbide powder is not less than 99%, and the mass purity of the niobium powder is not less than 99%. %, the particle size of the titanium powder is not greater than 5 μm, the particle size of the zirconium boride is not greater t...

Embodiment 3

[0035] In this embodiment Nb-Ti-ZrB 2 -SiC composite material is composed of the following substances in mass percentage: Ti 12%, ZrB 2 25%, SiC 14%, the balance being Nb and unavoidable impurities.

[0036] The present embodiment prepares described Nb-Ti-ZrB 2 - The method for SiC composites comprises the following steps:

[0037] Step 1. Put titanium powder, zirconium boride powder, silicon carbide powder and niobium powder in a ball mill, mix them evenly by means of wet ball milling, then dry them under vacuum conditions, and pulverize them to obtain mixed powders; preferably Specifically, the mass purity of the titanium powder is not less than 99%, the mass purity of the zirconium boride powder is not less than 99%, the mass purity of the silicon carbide powder is not less than 99%, and the mass purity of the niobium powder is not less than 99%. %, the particle size of the titanium powder is not greater than 5 μm, the particle size of the zirconium boride is not greater...

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Abstract

The invention belongs to the technical field of composite material preparation and specifically relates to a Nb-Ti-ZrB2-SiC composite material and a preparation method thereof. The Nb-Ti-ZrB2-SiC composite material comprises, by mass, 5%-20% of Ti, 10%-30% of ZrB2, 5%-15% of SiC, and the balance Nb. The preparation method of the Nb-Ti-ZrB2-SiC composite material comprises the steps that 1, titanium powder, zirconium boride powder, silicon carbide powder and niobium powder are dried after uniform ball-mill mixing, and mixed powder is obtained after smashing; and 2, the mixed powder is subjected to spark plasma sintering. The room temperature fracture toughness of the composite material is 8 MPa.m1 / 2-15 MPa.m1 / 2, the tensile strength under the condition of 1600 DEG C is 175 MPa-325 MPa, and material loss after oxidation 100 in the 1600 DEG C air environment is 0.072 mg / cm2-0.028 mg / cm2. The composite material can be applied to the 1600 DEG C air environment.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a kind of Nb-Ti-ZrB 2 -SiC composite material and its preparation method. Background technique [0002] As an important category in the material family, ultra-high temperature materials refer to a special material that can maintain physical and chemical stability in high temperature environments and oxidizing atmospheres. The high-temperature strength and high-temperature oxidation resistance of ultra-high temperature materials make them suitable for extreme environments, including supersonic flight, air reentry and rocket propulsion systems. Ultra-high temperature materials are playing an increasingly important role in national defense and aerospace. The materials that can be used in ultra-high temperature environments are mainly concentrated in refractory metals and ceramic materials. [0003] Refractory metals and their alloys have been widely studied...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/02C22C30/00C22C32/00C22C1/05C22C1/10
CPCC22C1/045C22C1/05C22C27/02C22C30/00C22C32/0047
Inventor 刘雷社范信江张伟樊强博胡昌宇
Owner XIAN AEROSPACE XINYU ELECTRICAL & MECHANICAL EQUIP FACTORY
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