Synthesis and Characterization of AlMgB₁₄-Ni₃Al Composites for Cutting Tool Materials

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.

• Periodical: Advanced Materials Research (Volume 1136)
• Pages: 257-262
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1136.257
• Online since: January 2016
• Authors: Yu Mei Zhou, Feng Lin Zhang*, Peng Cheng Li, Kun Bai, Shang Hua Wu
• Keywords: AlMgB₁₄, Mechanical Properties, Microstructual Characterization, Ni₃Al

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