Method for preparing light Nb-Ti-Al based porous material

An nb-ti-al, porous material technology, applied in the field of powder metallurgy porous materials, can solve problems such as low strength, and achieve the effects of improving strength, simple process, flexible and convenient operation
CN104404288AActive Publication Date: 2015-03-11UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2015-03-11

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Abstract

The invention provides a method for preparing a light Nb-Ti-Al based porous material, and belongs to the technical field of powder metallurgy porous materials. The method comprises the following process procedures: firstly, performing high energy ball milling on niobium powder, titanium powder, aluminum powder and element powder of other alloy elements to obtain mechanical alloyed powder; uniformly mixing Nb-Ti-Al based alloy powder with rotating electrode atomized niobium alloy powder through ball milling and forming at the pressure of 200-700 MPa to obtain a formed blank; performing vacuum pressure-free sintering and thermal treatment on the formed blank to obtain the Nb-Ti-Al based porous material. Pores are formed by virtue of the Kirkendall effect that pores are formed in a substrate because of partial diffusion of the Al element, and the strength of a porous body is improved with the combination of a sintered neck formed by the atomized alloy powder. The light Nb-Ti-Al based porous material is simple in preparation process, and the porous structure is easy to control.
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Description

technical field

[0001] The invention belongs to the technical field of powder metallurgy porous materials, and particularly provides a method for preparing lightweight Nb-Ti-Al-based porous materials. Background technique

[0002] Niobium has the smallest density among refractory metals. Adding strengthening elements such as Ti and Al to the niobium matrix can further reduce the density of niobium alloys, and maintain the characteristics of high melting point, high-temperature mechanical properties and excellent welding properties of niobium-based alloys. Nb-Ti-Al-based porous material is a lightweight structure-function integrated material, and its service temperature is higher than 1200°C, which is higher than the currently used nickel-based alloy porous material and TiAl intermetallic compound porous material. , has important application prospects in the fields of catalyst supports, filters and heat exchangers used under high temperature conditions. The preparation metho...

Claims

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