ANALYSIS OF GROWTH MECHANISM OF DENDRITIC TITANIUM CARBIDES PRODUCED BY LASER ALLOYING OF PURE TITANIUM WITH GRAPHITE POWDER

Y. S. Tian, C. Z. Chen (), D. Y. Wang, Q. H. Huo and T. Q. Lei
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Y. S. Tian: School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
C. Z. Chen: School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
D. Y. Wang: School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
Q. H. Huo: School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
T. Q. Lei: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China

Surface Review and Letters (SRL), 2005, vol. 12, issue 01, 41-45

Abstract: The microstructure of dendritic titanium carbides fabricated by laser surface alloying of pure titanium with graphite powder is investigated using electron probe microanalyzer (EPMA) and high-resolution transmission electron microscope (HRTEM). The growth mechanism ofTiCcrystals is that crystal grows by the model of continuous growth at the beginning of solidification and then the crystal surfaces that are suited to lateral growth develop fully by the model of spiral growth. So, the final morphology of dendritic TiC looks like it is composed of tiny crystal grains in a linear arrangement.

Keywords: Laser alloying; dendritic crystals; growth mechanism (search for similar items in EconPapers)
Date: 2005
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DOI: 10.1142/S0218625X05006743

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