(Ti, Cr) 2AlC solid solution composite material and preparation method thereof

A composite material and solid solution technology, which is applied in the field of composite material manufacturing, can solve problems such as high synthesis temperature, high reaction temperature, and no solid solution modification of the matrix phase, and achieve uniform and dense structure, excellent mechanical properties, and broaden the application range. effect

Inactive Publication Date: 2011-09-14
陕西鑫汇新能源科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As reported in the literature (Surface & Coatings Technology 203 (2009) 3595-3609), the use of elemental Cr for solid solution modification research has greatly improved the mechanical properties of the material, but the raw material cost of this method is high, and the synthesis temperature is relatively low. High, not conducive to its industrial production; there are also literature (Scripta Materialia 50 (2004) 897-901) reported the use of Al 2 o 3 Particles can pair with Ti 2 AlC has a similar structure to Ti 3 AlC 2 Research on the modification of material properties
However, the methods currently used are relatively simple, and at the same time, the preparation method is mainly based o

Method used

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  • (Ti, Cr) 2AlC solid solution composite material and preparation method thereof
  • (Ti, Cr) 2AlC solid solution composite material and preparation method thereof

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Effect test

Embodiment 1

[0020] A (Ti, Cr) 2 AlC solid solution composite material, the raw material composition is: 270 mesh Ti powder accounts for 66.18% of the total weight, 200 mesh Al powder accounts for 22.22% of the total weight, 1200 mesh C powder accounts for 8.11% of the total weight and Cr 2 o 3 Powder accounted for 3.49% of the total weight.

[0021] A (Ti, Cr) 2 The preparation method of AlC solid solution composite material, the steps are as follows:

[0022] 1. First, the purity is greater than or equal to 99%, and the fineness is 270 mesh metal Ti powder, 200 mesh Al powder, 1200 mesh C powder and metal oxide Cr 2 o 3 Weighing according to the following proportions, Ti powder accounts for 66.18% of the total weight, Al powder accounts for 22.22% of the total weight, C powder accounts for 8.11% of the total weight, Cr 2 o 3 Powder accounts for 3.49% of the total weight;

[0023] Two, the batching in the step 1 is put into the aluminum oxide ball mill jar and carry out mixed ball ...

Embodiment 2

[0030] A (Ti, Cr) 2 AlC solid solution composite material, the raw material composition is: 270 mesh Ti powder accounts for 62.44% of the total weight, 200 mesh Al powder accounts for 22.74% of the total weight, 1200 mesh C powder accounts for 7.88% of the total weight and Cr 2 o 3 Powder accounts for 6.94% of the total weight.

[0031] A (Ti, Cr) 2 The preparation method of AlC solid solution composite material, the steps are as follows:

[0032] 1. First, the purity is greater than or equal to 99%, and the fineness is 270 mesh metal Ti powder, 200 mesh Al powder, 1200 mesh C powder and metal oxide Cr 2 o 3 Weighing according to the following proportions, Ti powder accounts for 62.44% of the total weight, Al powder accounts for 22.74% of the total weight, C powder accounts for 7.88% of the total weight, Cr 2 o 3 Powder accounts for 6.94% of the total weight;

[0033] Two, the batching in the step 1 is put into the aluminum oxide ball mill jar and carry out mixed ball m...

Embodiment 3

[0040] A (Ti, Cr) 2 AlC solid solution composite material, the raw material composition is: 270 mesh Ti powder accounts for 55.09% of the total weight, 200 mesh Al powder accounts for 23.78% of the total weight, 1200 mesh C powder accounts for 7.42% of the total weight and Cr 2 o 3 Powder accounts for 13.71% of the total weight.

[0041] A (Ti, Cr) 2 The preparation method of AlC solid solution composite material, the steps are as follows:

[0042] 1. First, the purity is greater than or equal to 99%, and the fineness is 270 mesh metal Ti powder, 200 mesh Al powder, 1200 mesh C powder and metal oxide Cr 2 o 3 Weighing according to the following proportions, Ti powder accounts for 55.09% of the total weight, Al powder accounts for 23.78% of the total weight, C powder accounts for 7.42% of the total weight, Cr 2 o 3 Powder accounts for 13.71% of the total weight;

[0043] Two, the batching in the step 1 is put into the aluminum oxide ball mill jar and carry out mixed ball...

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Abstract

The invention discloses a (Ti, Cr) 2AlC solid solution composite material and a preparation method thereof. The preparation method comprises the following steps of: performing hot pressed sintering process on Ti power accounting for 40.92-70.11% of the total weight, Al power accounting for 20.15-24.02% of the total weight, C power accounting for 6.99-8.85% of the total weight and Cr2O3 power accounting for 0.88-28.07% of the total weight; and self-generating a granular reinforcement phase in the generation process of a substrate phase by using thermit reaction so as to prepare an aplitic composite material of which the substrate phase (Ti, Cr)2AlC is reinforced with an Al2O3 disperse phase; and performing solid solution strengthening on the substrate phase by using Cr generated by the reaction. Since the material has high composition adjustability, low firing temperature, even and dense structure, lower cost and excellent mechanical property, the application scope of the composite material is widened; in addition, by using the method, the firing temperature and the hot pressing pressure are reduced and micritization of crystals is realized.

Description

technical field [0001] The invention belongs to the field of composite material manufacturing, in particular to a (Ti, Cr) 2 AlC solid solution composite material and preparation method thereof. Background technique [0002] New Layered Ceramic Material Ti 2 AlC has attracted extensive research by many scholars at home and abroad for its excellent properties. Ti 2 AlC has the properties of metal, such as good thermal conductivity and electrical conductivity at room temperature, low Vickers hardness, high elastic modulus and shear modulus, and can be processed by traditional machining. It has plasticity; the material has the properties of ceramics, such as high melting point, high thermal stability and good oxidation resistance. However, this material also has disadvantages such as high sintering temperature, small temperature range, low hardness and low strength, which limit its further application. [0003] In recent years, in order to improve Ti 2 The properties of A...

Claims

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Application Information

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IPC IPC(8): C22C32/00C22C14/00C22C1/05
Inventor 朱建锋韩娜杨海波林营王芬杨文文叶兰王莉丽
Owner 陕西鑫汇新能源科技开发有限公司
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