Characterization of Interfacial Bonding Mechanism for Graphene-Modified Powder Metallurgy Nickle-Based Superalloy
来源期刊：Acta Metallurgica Sinica2018年第7期
论文作者：Jin-Wen Zou Xiao-Feng Wang Jie Yang Chuan-Bo Ji Xu-Qing Wang Xian-Qiang Fan Zhi-Peng Guo
文章页码：753 - 760
摘 要：A modified FGH96 superalloy using 0.1 wt% graphene was successfully prepared using the wet mixing method. The interfacial bonding mechanism between the graphene and the superalloy matrix was characterized using optical microscope, scanning electronic microscope, transmission electronic microscope and X-ray tomography. The results revealed that the graphene could be dispersed uniformly inside the matrix of the superalloy, and the bonding interface between graphene and the superalloy showed a rather diffusion instead of abrupt distinction, suggesting that the interface was formed via chemical fusion rather than a mechanical combination. The uniform dispersity of the graphene inside the superalloy matrix could improve the tensile properties significantly, including tensile strength, plasticity and yield strength.The existence of the graphene at the fracture surface further verified that the graphene could increase the effective bearing force of the material during the tensile test.
Jin-Wen Zou1,2，Xiao-Feng Wang1,2，Jie Yang1,2，Chuan-Bo Ji1,2，Xu-Qing Wang1,2，Xian-Qiang Fan3，Zhi-Peng Guo3
1. AECC Beijing Institute of Aeronautical Materials2. Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials3. School of Materials Science and Engineering, Tsinghua University
摘 要：A modified FGH96 superalloy using 0.1 wt% graphene was successfully prepared using the wet mixing method. The interfacial bonding mechanism between the graphene and the superalloy matrix was characterized using optical microscope, scanning electronic microscope, transmission electronic microscope and X-ray tomography. The results revealed that the graphene could be dispersed uniformly inside the matrix of the superalloy, and the bonding interface between graphene and the superalloy showed a rather diffusion instead of abrupt distinction, suggesting that the interface was formed via chemical fusion rather than a mechanical combination. The uniform dispersity of the graphene inside the superalloy matrix could improve the tensile properties significantly, including tensile strength, plasticity and yield strength.The existence of the graphene at the fracture surface further verified that the graphene could increase the effective bearing force of the material during the tensile test.
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