Understanding micro-diffusion bonding from the fabrication of B4C/Ni composites
- Resource Type
- Academic Journal
- Authors
- Miao Wang; Wen-xian Wang; Hong-sheng Chen; Yu-li Li
- Source
- 矿物冶金与材料学报 / International Journal of Minerals, Metallurgy and Materials. 25(3):365-374
- Subject
- B4C/Ni composites
spark plasma sintering
micro-diffusion welding
microstructure
nano-mechanical property
- Language
- Chinese
- ISSN
- 1674-4799
A Ni-B4C macroscopic diffusion welding couple and a Ni-15wt%B4C composite fabricated by spark plasma sintering (SPS) were used to understand the micro-scale diffusion bonding between metals and ceramics. In the Ni-B4C macroscopic diffusion welding couple a perfect diffusion welding joint was achieved. In the Ni-15wt%B4C sample, microstructure analyses demonstrated that loose structures oc-curred around the B4C particles. Energy dispersive X-ray spectroscopy analyses revealed that during the SPS process, the process of diffu-sion bonding between Ni and B4C particles can be divided into three stages. By employing a nano-indentation test, the room-temperature fracture toughness of the Ni matrix was found to be higher than that of the interface. The micro-diffusion bonding between Ni and B4C par-ticles is quite different from the Ni-B4C reaction couple.