a ti 5 the si 3 Particle-reinforced tial-based porous material with reticulated pore wall and preparation method thereof
A particle-reinforced, porous material technology, applied in the field of TiAl-based composite materials and its preparation, can solve problems such as insufficient high-temperature strength and hinder high-temperature applications, and achieve the effect of improving the structure of the pore wall
Active Publication Date: 2021-07-20
HARBIN INST OF TECH
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Problems solved by technology
At the same time, the insufficient high-temperature strength of TiAl hinders its high-temperature application
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specific Embodiment approach 1
[0040]Specific embodiment one: a kind of Ti of this embodiment 5 Si 3 The preparation method of the TiAl-based porous material with particle-reinforced reticular pore walls is carried out in the following steps:
[0041] 1. Preparation of Ti-Al composite body by pressureless impregnation: loosely pack spherical Ti powder in a crucible, then place Al-Si alloy block on the spherical Ti powder, put the crucible into a vacuum furnace, and under vacuum conditions, use Raise the temperature to 630°C at a heating rate of 25°C / min, and hold the temperature for 15 minutes to complete the impregnation of the Al-Si alloy into the spherical Ti powder preform to obtain a Ti-Al composite; the loose porosity of the spherical Ti powder is 48.2% The mass ratio of the spherical Ti powder and the Al-Si alloy block is 67:33; the mass content of Si in the Al-Si alloy block is 6%;
[0042] 2. Preparation of through-holes at medium temperature and without pressure: Under vacuum conditions, the fur...
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Abstract
A new type of Ti 5 Si 3 Particle-reinforced TiAl-based porous material with reticulated pore walls and a preparation method thereof. The invention belongs to the field of TiAl-based composite material and its preparation. The purpose of the present invention is to solve the technical problems that the through hole wall of the TiAl porous material is too simple and the corrosion resistance, high temperature oxidation resistance and filtering effect need to be improved, so as to adapt to more severe service conditions. A novel Ti of the present invention 5 Si 3 The TiAl-based porous material with particle-reinforced network pore wall is prepared from spherical Ti powder and Al-Si alloy through vacuum pressureless reaction impregnation and high-temperature heat treatment, and the obtained Ti 5 Si 3 The pore wall of the particle-reinforced TiAl-based porous material has reticular pores, the pore diameter of the reticular pores is 1 μm to 9 μm, the porosity is ≥58.6%, and the open porosity is ≥44.8%. The method of the present invention introduces Ti 5 Si 3 Particles are used to strengthen the mesh pore wall, which stabilizes the pore wall structure of porous materials, improves corrosion resistance and high temperature oxidation resistance, and thus increases service life. The preparation method of the present application is simple, efficient, and low in cost.
Description
technical field [0001] The invention belongs to the field of TiAl-based composite materials and preparation thereof; specifically relates to a Ti 5 Si 3 Particle-reinforced TiAl-based porous material with reticulated pore walls and a preparation method thereof. Background technique [0002] Due to their unique properties, porous materials are widely used in seawater desalination, aerospace, environmental protection, pharmaceutical separation, catalysis, energy storage, and chemical industries. Metal porous materials have high strength and good thermal conductivity, excellent shock absorption capacity, especially good gas-liquid permeability, and have great development potential in various industrial fields, but due to their poor corrosion resistance and high temperature resistance Poor oxidation performance limits its application in filtration fields such as high-temperature gas-liquid separation. The intermetallic compound porous material, especially the TiAl porous mate...
Claims
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IPC IPC(8): C22C1/08C22C14/00B22F3/11B22F3/24
CPCB22F3/114B22F3/24B22F2003/248C22C14/00
Inventor 李爱滨张学习王桂松钱明芳赵飒宋佳汶屈伟耿林
Owner HARBIN INST OF TECH