Pore morphologies and compressive strength of TiC/NiAl porous composites

doi:10.13251/j.issn.0254-6051.2020.05.001

Abstract

Abstract: TiC/NiAl porous composites were synthesized in situ by self-propagating technology through controlling the reaction among Ti, C, Ni and Al powers. Influences of Ti-C contents (molar ratio 1∶1) on the pore morphologies and compressive strength of the porous materials were investigated. The results show that the pore morphology of the porous materials is mainly affected by the volatilization of adsorbed gases and the flow of liquid phase, the porosity and pore size increase with the increase of Ti-C content. When Ti-C content is 0-25%, the distribution of pores with near spherical morphology is uniform, and the pore size ranges between 20-70 μm, the compressive strength of the porous material increases with the increase of Ti-C content. When Ti-C content is 30%, besides the near spherical pores, some irregular and long narrow pores larger than 100 μm are formed, and the compressive strength decreases.

Key words: self-propagating, TiC/NiAl porous composites, pore morphology, compressive strength

CLC Number:

TB333

Guo Fengxue, Wu Jie, Chen Yunbo, Zuo Lingli, Liu Xiaoping. Pore morphologies and compressive strength of TiC/NiAl porous composites[J]. Heat Treatment of Metals, 2020, 45(5): 1-4.

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