CAJ | 학술논문

以Ni、Al元素粉末为原料,采用反应烧结工艺制备多孔NiAl金属间化合物材料,表征各烧结温度所对应的孔结构,研究NiAl烧结体的造孔机理.结果表明:在多孔NiAl金属间化合物材料的制备过程中,当温度在1100℃以下,随着烧结温度的升高,NiAl烧结体中的孔隙度和最大孔径呈现增大的趋势;经1100℃烧结之后,多孔NiAl的孔隙度为53%,最大孔径为55μm;造孔机理为Al熔点附近的Ni、Al之间的剧烈扩散造孔形成大量的开孔隙度,以及高温烧结阶段的Ni与中间相的扩散形成的多孔NiAl材料骨架中的孔洞.
이Ni、Al원소분말위원료,채용반응소결공예제비다공NiAl금속간화합물재료,표정각소결온도소대응적공결구,연구NiAl소결체적조공궤리.결과표명:재다공NiAl금속간화합물재료적제비과정중,당온도재1100℃이하,수착소결온도적승고,NiAl소결체중적공극도화최대공경정현증대적추세;경1100℃소결지후,다공NiAl적공극도위53%,최대공경위55μm;조공궤리위Al용점부근적Ni、Al지간적극렬확산조공형성대량적개공극도,이급고온소결계단적Ni여중간상적확산형성적다공NiAl재료골가중적공동.
@@@@The porous NiAl intermetallic was prepared using Ni, Al elemental powders as raw material through reaction sintering process, and the pore structures corresponding to the sintering temperature was also characterized. The results show that the porosity of porous NiAl intermetallic compounds during the preparation increases with the sintering temperature increasing. The porosity in the sintered body and the maximum pore size of porous NiAl are about 53%and 55μm, respectively, at 1 100℃. The pore formation mechanism of porous NiAl is that the large number of open porosity forms by the dramatic interdiffusion reaction between Ni and Al near the Al melting point temperature, and the porosity in the porous material skeletons forms by the interdiffusion reaction between the Ni and intermediates at high temperature.