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Powder sintering of porous Ti Ni alloy using pore forming agent of NH4HCO3

YONG HUA LI1,* , HONG LIU2, JING ZHANG1, ZHEN QIAN SUN1, QIAN SUN, ZI YU DENG1

Affiliation

  1. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, P.R. China
  2. Institute of High er Education Research, Shenyang Ligong University, Shenyang 110159, P.R. China

Abstract

Porous TiNi shape memory alloy (was fabricated by powder sintering using powders of TiH2, Ni and pore forming agent of NH4HCO3. The research results reveal that phase compositions of the sintered porous TiNi SMA are independent of addition of pore forming agent. Microstructure s and mechanical propert ies are dependent strongly on the adding amount of pore forming agent. Average pore size and porosity increase while compres sive strength and elastic modulus decrease with the amount of pore forming agent. The appropriate pore structure and mechanical propert ies meet the demands of cancellous bone, suggesting porous TiNi SMA is fit for orthopedic application..

Keywords

Porous shape memory alloy, Biomaterial, Powder sintering, Pore characteristics, Mechanical property.

Citation

YONG HUA LI, HONG LIU, JING ZHANG, ZHEN QIAN SUN, QIAN SUN, ZI YU DENG, Powder sintering of porous Ti Ni alloy using pore forming agent of NH4HCO3, Optoelectronics and Advanced Materials - Rapid Communications, 7, 5-6, May-June 2013, pp.414-416 (2013).

Submitted at: Dec. 10, 2012

Accepted at: June 12, 2013