Ultrafine-grained Ti66Nb13Cu8Ni6.8Al6.2 composites fabricated by spark plasma sintering and crystallization of amorphous phase

作者：Li, Y Y^*; Yang, C; Chen, W P; Li, X Q; Qu, S G

来源：Journal of Materials Research, 2009, 24(6): 2118-2122.

DOI：10.1557/JMR.2009.0231

• Amorphous phase
• Bulk composites
• Large-sized
• Microstructure analysis
• Ultra-fine-grained

We report on the formation of ultrafine-grained Ti66Nb13Cu8Ni6.8Al6.2 Composites with in situ precipitated micrometer-sized beta-Ti(Nb) phase by spark plasma sintering with crystallization. Microstructure analysis indicated that all alloys consisted of soft (Cu, Ni)Ti-2, regions surrounded by hard beta-Ti(Nb) regions but displayed different microstructures. The alloys exhibited high fracture strength of more than 2200 Mpa and remarkable plasticity of similar to 25%. The results provided a promising method for fabricating large-sized bulk composites with excellent mechanical properties by powder metallurgy.

• 出版日期2009-6
• 单位华南理工大学