Method for improving property of TiAI intermetallic compound based composite material
An intermetallic compound and composite material technology, which is applied in the field of improving the mechanical properties of TiAl intermetallic compound-based composite materials, can solve the problem that the mechanical properties such as bending strength and fracture toughness are not improved enough to be replaced, and achieve the improvement of mechanical properties and bending. Effects of Strength and Fracture Toughness
Inactive Publication Date: 2008-10-15
UNIV OF JINAN
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Problems solved by technology
[0005] At present, in terms of improving the comprehensive properties of TiAl intermetallic compounds, it has not yet met the requirements of practical application, and its mechanical properties such as bending strength and fracture toughness have not been improved enough to replace the existing high-temperature structural materials.
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[0044] The present invention will be described in detail below.
[0045] Select the raw materials in Table 1, according to the mole percentage of 49.45% Ti powder, 48.30% Al powder, 2.25% Nb powder, add in the ball mill in the ratio of 10:1 according to the ball-to-material ratio, carry out mechanical mixing, then, heat up to 1100 -1200°C, TiAl was produced by thermal explosion reaction synthesis method, and ground through a 325 mesh sieve to obtain TiAl-based alloy powder Ti-48.30A1-2.25Nb, referred to as TN. Preparation process such as figure 1 .
[0046] Choose the raw material of table 1, according to mole percentage 48.78% Ti powder, 47.66% Al powder, 2.22% Nb powder, 1.34B powder, add in the ball mill in the ratio of 10: 1 by ball material ratio, carry out mechanical mixing, then , the temperature was raised to 1100-1200°C, TiAl was prepared by thermal explosion reaction synthesis method, and ground through a 325 mesh sieve to obtain TiAl-based alloy powder Ti-47.66Al...
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Abstract
The invention relates the method of ameliorating the mechanics property of TiAl intermetallic compound composite material. The method comprises the following steps: using the 35-55mol%Ti, 35-50mol%Al, 3-10mol%Nb, 0-5mol%B powders to make TiAl base powdered alloy; adding the 5%-20wt% TiC ceramic particle in TiAl base powdered alloy, adopting electric discharge plasma sintering method to make Ti2AlC / TiAl composite material; carrying out heat treatment to the Ti2AlC / TiAl composite material. The method improves the bending strength, mechanics property and fracture toughness property of TiAl intermetallic compound composite material.
Description
(1) Technical field [0001] The invention relates to a method for improving the mechanical properties of a TiAl intermetallic compound-based composite material by heat treatment and alloying. (2) Background technology [0002] Intermetallic compound structural materials mainly utilize the strength, stiffness, hardness, heat resistance and high temperature creep resistance of intermetallic compounds. Intermetallic compounds such as Ni 3 Al, NiAl, Ti 3 Al, TiAl, Fe 3 Al and FeAl are a new generation of high-temperature structural materials. Among them, due to the coexistence of metal bonds and covalent bonds in the crystal of Ti-Al intermetallic compounds, it is possible to have both the toughness of metals and the high-temperature performance of ceramics, as well as the resulting high specific strength, specific modulus, and good Oxidation resistance, creep resistance, excellent high temperature strength, stiffness and low density, etc., make it superior to the widely used...
Claims
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IPC IPC(8): C22C33/02C22C45/00C22C1/00
Inventor 岳云龙陶文宏吴海涛吴波公衍生
Owner UNIV OF JINAN