A method for preparing tic-reinforced titanium-based composites based on cross-linking modified sintered titanium hydride

A titanium-based composite material, cross-linking modification technology, applied in the direction of transition element hydride, etc., can solve the problems of high residual porosity, low material utilization rate and high manufacturing cost of titanium-based composite materials, and achieve great practical and industrial value , Uniform block structure and cost reduction effect

Active Publication Date: 2022-04-15
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] To realize the great application of pure titanium in daily consumption and other fields, two problems need to be overcome: 1. The strength of pure titanium is low
The introduction of interstitial atoms to solid solution strengthening of titanium will damage its plasticity, and interstitial atoms are difficult to remove
2. High manufacturing cost
[0006] (1) The preparation of titanium-based composites by melting and casting requires a melting temperature higher than the melting point of titanium (1668°C), which consumes a lot of energy; moreover, the material utilization rate of cast titanium-based composite products is low
[0007] (2) The preparation of titanium-based composites by powder metallurgy uses pure titanium as a raw material combined with mechanical alloying, element mixing and other methods to introduce a reinforcing phase, which has high impurity content and high manufacturing costs.
[0008] (3) The existing titanium matrix composites prepared by sintering titanium hydride powder have high residual porosity and poor mechanical properties

Method used

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  • A method for preparing tic-reinforced titanium-based composites based on cross-linking modified sintered titanium hydride
  • A method for preparing tic-reinforced titanium-based composites based on cross-linking modified sintered titanium hydride
  • A method for preparing tic-reinforced titanium-based composites based on cross-linking modified sintered titanium hydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation method of TiC-reinforced titanium-based composite material prepared by sintering titanium hydride based on cross-linking reaction, comprising the following steps:

[0044] The raw materials used in this example are as follows: polyvinyl alcohol (350), titanium hydride powder (100 mesh), deionized water, absolute ethanol, and stearic acid.

[0045] (1) Surface hydroxylation of titanium hydride powder: First, weigh 10 parts by mass of polyvinyl alcohol powder and pour it into 200 parts by volume of deionized water, use a magnetic stirrer to heat the solution to 87°C and stir at 1000rpm for 2h to make the polymer After the vinyl alcohol was completely dissolved, it was cooled to room temperature; after that, 50 parts by mass of titanium hydride powder was weighed and slowly poured into the polyvinyl alcohol solution and stirred at a speed of 1000 rpm for 3 hours; finally, the filtration and deionized water cleaning processes were repeated 3 times, and the temp...

Embodiment 2

[0050] A preparation method of TiC-reinforced titanium-based composite material prepared by sintering titanium hydride based on cross-linking reaction, comprising the following steps:

[0051] The raw materials used in this example are as follows: polyvinyl alcohol (350), titanium hydride powder (100 mesh), deionized water, and graphene oxide.

[0052] (1) Surface hydroxylation of titanium hydride powder: First, weigh 1 part by mass of polyvinyl alcohol powder and pour it into 200 parts by volume of deionized water, use a magnetic stirrer to heat the solution to 87° C. and stir at 2000 rpm for 2 hours to make polyethylene After the alcohol was completely dissolved, it was cooled to room temperature; secondly, 50 parts by mass of titanium hydride powder was weighed and slowly poured into the polyvinyl alcohol solution and stirred at a speed of 1000 rpm for 3 hours; finally, after repeating the filtration and deionized water cleaning process for 3 times, at 70 ° C Dry for 12h to...

Embodiment 3

[0057] A preparation method of TiC-reinforced titanium-based composite material prepared by sintering titanium hydride based on cross-linking reaction, comprising the following steps:

[0058] The raw materials used in this example are as follows: polyvinyl alcohol (350), titanium hydride powder (100 mesh), deionized water, and graphene oxide.

[0059] (1) Surface hydroxylation of titanium hydride powder: First, 20 parts by mass of polyvinyl alcohol powder was weighed and poured into 200 parts by volume of deionized water, and the solution was heated to 87° C. with a magnetic stirrer and stirred at 1000 rpm for 2 hours to make the polymer After the vinyl alcohol was completely dissolved, it was cooled to room temperature; secondly, 50 parts by mass of titanium hydride powder was weighed and slowly poured into the polyvinyl alcohol solution and stirred at 1000 rpm for 3 h; finally, the filtration and deionized water cleaning processes were repeated 3 times, and at 70 The pretre...

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Abstract

The invention belongs to the technical field of non-ferrous metal processing, and discloses a method for preparing a TiC-reinforced titanium-based composite material based on cross-linked modified sintered titanium hydride and the prepared composite material, specifically, hydroxylated titanium hydride and carbon source Composite powders were prepared by cross-linking reaction and sintered at high temperature to generate TiC-reinforced titanium-based composites in situ. The composite material prepared by the method of the present invention is that TiC with a size of 1-50 μm is uniformly distributed in the Ti matrix, and the density of the sintered block is greater than or equal to 99%; its tensile plasticity can reach 8%, and its tensile strength can reach 570 MPa, and the wear The volume is reduced by 19% compared to pure titanium. The method of the invention solves the problem of poor mechanical properties of the titanium-based composite material prepared from titanium hydride in the prior art, and reduces its preparation cost. The obtained TiC-reinforced titanium-based composite material with excellent performance can be applied to aerospace, armored vehicles, In the preparation of high-strength and wear-resistant structural parts in the fields of weapons, ships, and automobiles.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing, and in particular relates to a method for preparing a TiC reinforced titanium-based composite material based on cross-linked modified sintered titanium hydride and the composite material prepared therefrom, in particular to the preparation of a hydroxylated titanium hydride and a carbon source The composite powder was prepared by cross-linking reaction and sintered at high temperature to generate TiC-reinforced titanium matrix composites in situ. Background technique [0002] Titanium has high specific strength, excellent corrosion resistance, excellent biocompatibility, low thermal expansion coefficient and high service temperature. It is an ideal lightweight structural material for high-precision aerospace, military, Biomedical devices and other fields also have great application potential in the fields of automobiles, energy, chemicals and daily consumption. [0003] To r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C14/00C22C32/00B22F3/02B22F3/10B22F3/105C01B6/02
CPCC22C1/05C22C14/00C22C32/0052B22F3/02B22F3/1007B22F3/105C01B6/02
Inventor 杨超陈涛屈盛官李元元洪振军贾冬生卢知渊王卓
Owner SOUTH CHINA UNIV OF TECH
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