Understanding micro-diffusion bonding from the fabrication of B4C/Ni composites
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第3期
论文作者：Miao Wang Wen-xian Wang Hong-sheng Chen Yu-li Li
文章页码：365 - 374
摘 要：A Ni-B4C macroscopic diffusion welding couple and a Ni-15 wt% 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-15 wt% B4C sample, microstructure analyses demonstrated that loose structures occurred around the B4C particles. Energy dispersive X-ray spectroscopy analyses revealed that during the SPS process, the process of diffusion 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 particles is quite different from the Ni-B4C reaction couple.
Miao Wang1,2，Wen-xian Wang1,2，Hong-sheng Chen1,2，Yu-li Li1,2
1. College of Materials Science and Engineering, Taiyuan University of Technology2. Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology
摘 要：A Ni-B4C macroscopic diffusion welding couple and a Ni-15 wt% 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-15 wt% B4C sample, microstructure analyses demonstrated that loose structures occurred around the B4C particles. Energy dispersive X-ray spectroscopy analyses revealed that during the SPS process, the process of diffusion 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 particles is quite different from the Ni-B4C reaction couple.
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