Microstructure and kinetics of a functionally graded NiTi-TiCx composite produced by combustion synthesis

作者：Burkes Douglas E^*; Moore John J

来源：Journal of Alloys and Compounds, 2007, 430(1-2): 274-281.

DOI：10.1016/j.jallcom.2006.05.008

• composite materials
• metal matrix composites
• chemical synthesis
• microstructum
• thermal analysis

Production of a NiTi-TiCx functionally graded material (FGM) composite is possible through use of a combustion synthesis (CS) reaction employing the propagating mode (SHS). The NiTi-TiCx FGM combines the well-known and understood superelastic and shape memory capabilities of NiTi with the high hardness, wear and corrosion resistance of TiCx. The material layers were observed as functionally graded both in composition and porosity with distinct interfaces, while still maintaining good material interaction and bonding. XRD of the FGM composite revealed the presence of TiCx with equi-atomic NiTi and minor NiTi2 and NiTi3 phases. The TiCx particle size decreased with increasing NiTi content. Microindentation performed across the length of the FGM revealed a decrease in hardness as the NiTi content increased.

• 出版日期2007-3-14