Preparation method for Al-Ti-C system reaction cored wire

A powder core wire material, al-ti-c technology, applied in metal material coating process, fusion spraying, coating, etc., can solve the problems of complicated process and equipment, restrictions on practical application, harsh preparation conditions, etc., and achieve The effect of uniform structure, good machining performance and excellent comprehensive performance

Inactive Publication Date: 2015-10-21
ACADEMY OF ARMORED FORCES ENG PLA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the preparation conditions of this type of ceramic material are harsh, the process and equipment are complicated, and the cost is high, which restricts its practical application.

Method used

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  • Preparation method for Al-Ti-C system reaction cored wire
  • Preparation method for Al-Ti-C system reaction cored wire
  • Preparation method for Al-Ti-C system reaction cored wire

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples.

[0028] figure 1 It is a process flow chart of preparing Al-Ti-C system reaction powder core wire with -400 mesh titanium powder as raw material and absolute ethanol as organic solvent. Such as figure 1 Shown, the present invention prepares Al-Ti-C system reaction powder core wire material, implements according to the following steps:

[0029]Step 1: Weigh 1150g of Ti powder with a particle size of -400 mesh and a purity of 99.9%, put it in a sand mill, add 500ml of absolute ethanol, and wet mill for 8 hours. During the wet mill, add a small amount of ethanol according to the volatilization of ethanol to keep the sand The ethanol in the mill can infiltrate titanium powder. Weigh 342g of analytically pure sucrose (the molar ratio of titanium powder to sucrose is 24:1), dissolve it in 200ml of distilled water, pour the sucrose sol...

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Abstract

The invention relates to the technical field of ceramic matrix composite preparation, and in particular to a preparation method for an Al-Ti-C system reaction cored wire. The method includes the steps that firstly, titanium powder is wetly ground in an organic solvent medium (absolute ethyl alcohol or acetone), a sucrose solution is added, and therefore a mixed material is generated; secondly, the mixed material is evenly stirred and then dried and placed in a vacuum heat treatment furnace so as to be heated, sucrose is carbonized, and a Ti-C mixed system is formed; thirdly, the carbonized mixed material is crushed, Ti-C composite powder with the proper grain diameter is obtained through screening and serves as a cored material; fourthly, an aluminum belt serves as a skin material, the Ti-C composite powder serves as the cored material, and a multi-stage continuous wire-drawing diameter-reducing method is adopted for preparing the Al-Ti-C cored wire. The method is characterized in that the skin material and the cored wire are both components of the reaction system, the Al-Ti-C reaction system is formed and generates a self-propagating high-temperature synthesis (SHS) reaction in the spraying process, a Ti2AlC-base ceramic coating is synthesized in situ, low-cost raw materials can be used, and a composite ceramic coating with the high performance can be acquired through the SHS reaction.

Description

technical field [0001] The invention relates to the technical field of preparation of ceramic matrix composite materials, in particular to a method for preparing a powder core wire material for reactive thermal spraying ceramic coating. Background technique [0002] Due to the characteristics of high melting point, high strength, high hardness, high modulus, and high chemical stability of ceramic materials, thermal sprayed ceramic coatings have excellent properties such as high temperature resistance, oxidation resistance, wear resistance, and corrosion resistance. Ceramic coatings are usually made of ceramic powder or rods, and are prepared by thermal spraying techniques such as plasma spraying, detonation spraying, and supersonic flame spraying. However, using this method to prepare ceramic coatings, on the one hand, due to the need for expensive ceramic powder or rods as spraying raw materials, and thermal spraying technology equipment that can provide high-power heat sou...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06
Inventor 刘宏伟朱胜孙思浩许一林国宝郭永铭彭齐欣尹艳丽郭蕾
Owner ACADEMY OF ARMORED FORCES ENG PLA
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