Investigation of combustion channel in fabrication of porous NiTi alloy implants by SHS

Abstract

In this study, NiTi alloy was conducted under varying cold compaction pressure, preheating temperature and heating rate. The distance between the adjacent striations was increased when the cold compaction pressure or green density was increased. The threshold-heating rate was determined as 60 degrees C/min for this study. It was observed that when the amount of liquid phase excessively increased, porosity decreased and the specimen deformed. This situation occurred with increase in heating rates (>= 60 degrees C/min), preheating temperatures (>250 degrees C) and cold compaction pressures (>7 MPa). (C) 2011 Elsevier B.V. All rights reserved.