Nagoya University · Materials Science
Professor Takahisa Yamamoto's research lab specializes in the microstructural design and characterization of advanced cemented carbides, with a focus on understanding the role of dopants such as vanadium carbide (VC) in modifying grain boundary structures and interfacial properties. The lab employs advanced electron microscopy techniques—particularly high-resolution transmission electron microscopy (HRTEM) and energy-dispersive X-ray spectroscopy (EDS)—to investigate atomic-scale evolution during solid-state processing. Their work emphasizes the formation mechanisms of facetted interfaces in WC–Co systems, contributing to the development of ultrafine and high-performance hard materials. The lab's research bridges materials synthesis, microstructure control, and property optimization for industrial applications in cutting tools and wear-resistant components.
Figures are computed from collected data and may differ slightly.
Microstructure evolution in VC-doped WC–Co was investigated using high-resolution transmission electron microscopy (HRTEM) associated with X-ray energy dispersive spectroscopy (EDS) with a special interest in WC/Co and WC/WC boundaries. It was found that the morphology of carbide grains changed largely by the addition of VC. The WC/Co interfaces tend to form facetting with fine multi-steps of (0001) and {} habits by VC-doping. In addition, the facetting morphology of WC/Co interfaces was confirm
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