Papers by Author: Feng Lin Zhang

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Authors: Yu Mei Zhou, Feng Lin Zhang, Peng Cheng Li, Kun Bai, Shang Hua Wu
Abstract: AlMgB14 is a very hard and brittle material which need be modified for utilizing as cutting tool materials. In present study, TiB2 and Ni3Al were used to strengthen and toughen AlMgB14 material. The microstructure of the AlMgB14-TiB2-Ni3Al composites was analysized by scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDX) and an X-ray diffractometer (XRD). The hardness and fracture toughness of the AlMgB14-TiB2Ni3Al composites were also examined. The results showed that the major phases in AlMgB14-Ni3Al composites were TiB2, AlMgB14, MgAl2O4 , Ni3Al and NiAl. With the increasing of the amount of Ni3Al, more intergranular fractured features can be found in the fractured surface of the composites, the hardness and fracture toughness of the composites were both decreased comparing to the synthesised AlMgB14. The AlMgB14-TiB2-4wt.% Ni3Al composite has a hardness of 28.1 Gpa and a fracture toughness of 3.14 MPa·m1/2.
607
Authors: Feng Lin Zhang, Hui Yuan, Cheng Yong Wang, K.X. Fu, Y.M. Zhou
Abstract: Diamond tool based on Ni-Al self-propagating high temperature synthesis (SHS) was introduced in this paper. Different heating methods such as muffle furnace, vacuum furnace and induction were used to ignite the Ni-Al-diamond SHS system. The morphology and microstructure of the Ni-Al-diamond composite were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM). It was found that SHS Ni-Al-diamond composite ignited by induction heating owned the best morphology and microstructure to work as diamond tool.
531
Authors: Feng Lin Zhang, Yu Mei Zhou, Chang Wen Guo, Jun Bo Mao, Hui Ping Huang
Abstract: Diamond tools are fabricated by brazing and used to machine dental ceramics in this paper. The morphology, grinding ratio, wear and grinding force of the brazed tools are investigated in comparison with that of the electroplated ones. The results show that the brazed alloy forms a hill-like structure around the diamond grits, and the protrusion of the brazed diamond grits is higher than that of the electroplated one. The grinding ratio of the brazed diamond tool is higher than the electroplated one. Many fall-off diamond pits of the electroplated tool and only few micro-crack diamond grits of the brazed tool are observed after grinding, and the brazed one remains well process capability. The grinding force of the electroplated tool is larger than that of the brazed one.
84
Authors: Zhong Ning Guo, Cheng Yong Wang, Feng Lin Zhang, T.C. Kuang
165
Authors: Zuo Xiang Qin, Cheng Yong Wang, Feng Lin Zhang, Xin Wei
285
Authors: Feng Lin Zhang, Peng Liu, Peng Wang, Yu Mei Zhou, Hui Ping Huang, Jia Bin Lu
Abstract: Monolayer brazed diamond wheel were used to grind AlSiC composite with different volume fraction of SiC. The effects of diamond mesh size of the grinding wheels and the volume fraction of SiC in AlSiC composite on the surface integrity of ground AlSiC composite were investigated. It is found that the surface roughness of ground AlSiC composite with 20% SiC is increased with the reduction of diamond grit’s size because of the clogging of diamond wheel. With the increasing of the volume fraction of SiC, there are more fractured and cracked SiC particles on the ground surface of AlSiC composite. On the other hand, the finer diamond grits (70/80) induce the finer fractured SiC particles on the ground surface of AlSiC with 50% and 70% SiC.
526
Authors: Yu Mei Zhou, Feng Lin Zhang, Peng Cheng Li, Kun Bai, Shang Hua Wu
Abstract: AlMgB14 is a novel hard and brittle material which need be improved toughness for utilizing as cutting tool materials. In present study, intermetallic compound Ni3Al were attempted to dope the synthesised AlMgB14 materials. The microstructure of the AlMgB14-Ni3Al composites was analysized by scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDX) and an X-ray diffractometer (XRD). The density, hardness and fracture toughness of AlMgB14-Ni3Al composites were also measured. The results showed that the major phases in AlMgB14-Ni3Al composites were AlMgB14, MgAl2O4 , Ni3Al and NiAl as well as W2B5. With the increasing of the amount of Ni3Al, more transgranular fractured features can be found in the fractured surface, the density of the AlMgB14-Ni3Al composites was increased, the hardness and fracture toughness of the AlMgB14-Ni3Al composites were decreased.
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