Effect of NH₄HCO₃ Contents on the Microstructure of the Microwave Sintered Porous NiTi Alloys

Abstract:

In this paper, the porous NiTi alloys were prepared by microwave sintering, and the effects of NH₄HCO₃ contents on the microstructure of the porous NiTi alloys were studied. The microstructure of the porous NiTi alloys was investigated by optical microscopy, Archimedes drainage method, surface roughmeter and X-ray diffraction. The results showed that the porous NiTi alloys were mainly composed of NiTi, Ni₃Ti, Ti₂Ni and Ni, and the diffraction peaks of the non-equiatomic phases (Ni₃Ti, Ti₂Ni and Ni) increased with increasing the NH₄HCO₃ contents. At the same time, the porosity, pore size and surface roughness of the porous NiTi alloys increased with the increase of the NH₄HCO₃ contents.

• Periodical: Applied Mechanics and Materials (Volumes 496-500)
• Pages: 264-267
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.496-500.264
• Online since: January 2014
• Authors: Ji Lin Xu, Xiao Fei Jin, Jun Ming Luo, Ai Hui Liu
• Keywords: Microstructure, Microwave Sintering, NH₄HCO₃ Content, Porous NiTi Alloy

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