Spark plasma sintering reaction synthesized TiB reinforced titanium matrix composites

作者：Feng HB^*; Jia DC; Zhou Y

来源：Composites Part A: Applied Science and Manufacturing , 2005, 36(5): 558-563.

DOI：10.1016/j.compositesa.2004.09.003

• metal-matrix composites (MMCs)
• particle-reinforcement
• microstructure
• mechanical properties
• spark plasma sintering

The in situ TiB particle reinforced titanium metal matrix composites were prepared using MA followed by park plasma sintering (SPS) with a heating rate of 50 degrees C/min. The in situ TiB were synthesized by chemical reaction between TiB, and Ti during the SPS process. The microstructure of the composites sintered at 800, 1000 and 1200 degrees C were investigated. TiB whiskers are needle-shape and uniformly dispersed in the titanium matrix. The interface between the in situ TiB needles and the titanium matrix is singular and faceted. The composite sintered at 1000 degrees C has a maximum value of relative density of 99.6%, and good mechanical properties with a flexural strength of 1007 MPa, Young's modulus of 146 GPa and fracture toughness of 8.64 MPa. m(1/2), respectively. The fractographs of all composites exhibit a predominantly brittle cleavage fracture mechanism. The elastic modulus of synthesized TiB was estimated.

• 出版日期2005
• 单位哈尔滨工业大学