Multiscale and Multilevel Composite of Solidified TiB2 Matrix Ceramic to Ti-6Al-4V Achieved by Reaction Processing in High-gravity Field

作者：Zhao Zhongmin^*; Zhang Long; Wang Minquan

来源：Rare Metal Materials and Engineering, 2013, 42: 383-387.

• layered composite of ceramic with metal
• multiscale and multilevel composite
• reaction processing in high-gravity field
• fusion bonding
• atomic interdiffusion

Based on fusion bonding and atomic interdiffusion between the ceramic and Ti alloy, the layered composite of the solidified TiB2 matrix ceramic to Ti-6Al-4V alloy was achieved by reaction processing in high-gravity field. XRD, FESEM and EDS results show it is just the intensive self-toughening mechanism initiated by fine platelets of TiB2 primary phases that the solidified ceramic present a excellent combination of high flexural strength and high fracture toughness; meanwhile, as a result of fusion bonding between the liquid ceramic and Ti alloy in thermal-vacuum circumstances induced by reaction processing in high-gravity field, followed by intensive atomic interdiffusion between the liquid ceramic and liquid titanium, peritectic reaction of the solidified TiB2 and liquid Ti has to take place at the final stage of material solidification, followed by direct growth of TiB solids from liquid Ti and subsequent eutectic reaction of TiB solids and liquid Ti; finally, the compsoite of the solidifed ceramic with Ti alloy is achieved in multiscale (micrometer/submicrometer/micro-nanomter) and multilevel (TiC-TiB2/TiC1-x-TiB-TiB2/TiB2-Ti-TiC1-x-TiB/TiB2-TiC1-x-TiB-Ti/TiB-TiC1-x-Ti/TiC1-x-Ti/Ti) characterized by the size and distribution of TiB2 and TiB phases.

• 出版日期2013-6