C/ZrC-SiC-Cu composite material and preparation method thereof

Abstract

The invention discloses a C/ZrC-SiC-Cu composite material with spontaneous sweating function, and a preparation method thereof. The C/ZrC-SiC-Cu composite material takes carbon fiber as a reinforcement toughening phase, ZrC and SiC as matrixes and Cu as a diaphoretic, wherein the volume fraction of the carbon fiber is 10%-50%, the volume fraction of the ZrC is 5%-40%, the volume fraction of the SiC is 5%-20%, the volume fraction of the Cu diaphoretic is 5%-30%, the porosity rate is 3%-10%, the balance of impurities comprising less residual metal Zr and matrixes C and the like. The preparation method of the material comprises the steps of: by taking a carbon fiber prefabricated part as a fundamental, preparing C/C-SiC composite material, and then preparing the C/ZrC-SiC-Cu composite material by taking Zr-Cu binary alloy as a penetrating agent through metal infiltration reaction. The material is superhigh-temperature-resistant, good in fracture toughness, excellent in ablation resistance property, good in thermal shock resistance, and the preparation technique is simple, low in cost, corrosion-free for equipment, and free from environment pollution.

Description

[0001] The invention relates to a ceramic-based composite material with copper as a sweating agent and a carbide as a matrix and a preparation method thereof, in particular to a C / ZrC-SiC-Cu composite material with a self-sweating function and a preparation method thereof. Background technique [0002] Extreme environments such as long-term flight of hypersonic vehicles, atmospheric re-entry, trans-atmospheric flight, and new solid-liquid hybrid rocket propulsion systems place extremely stringent requirements on high-temperature thermal structural materials. In these environments, high-temperature thermal structural materials must not only withstand operating temperatures above 3000K, but also withstand the erosion of high-speed airflow and the corrosion of oxidizing gases. As a typical representative of ultra-high temperature resistant ceramics, zirconium carbide (ZrC) has a melting point of 3530 ° C, and has high strength, high hardness and excellent high temperature stabilit...

AI Technical Summary

Problems solved by technology

However, ZrC ceramics have two disadvantages: first, ZrC ceramics are brittle and prone to catastrophic failure when used directly as a structural material; 2 The melting point of ZrC is about 2700°C, that is, ZrC has the problem of insufficient oxidation resistance in an environment lower than 2700°C, and the problem of matrix softening and insufficient temperature resistance in an environment higher than 2700°C

Up to now, there have been no public literature reports on C / ZrC-SiC-Cu materials and their preparation methods at home and abroad.

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