Research on The Pore-Forming Mechanism of Porous Tial Intermetallics with (NH4)2C03

摘要

Porous TiAl intermetallic compound is a material with excellent properties,which could be applied to various fields.However,the disadvantage of current porous TiAl intermetallics is that the permeate flux is low.In this paper,(NH4)2O3 was selected as pore-forming agent to fabricate porous TiAl intermetallics by activation reactive sintering.After that,the effect of pore former (NH4)2CO3 content and pore-forming mechanism were investigated.The results indicated that the pore former (NH4)2CO3 is benefit for the formation of through-holes in porous TiAl intermetallics,and the Kirkendall partial diffusion effect has great influence on the pore formation.