Evaluation of oxidation and mechanical properties of nanosized WC-10% Nicrobraz composites consolidated by high frequency induction heated sintering

• Published in: Materials science and technology 2012-02, Vol.27 (1), p.39-42
• Main Authors: Woo, K-D, Kang, D-S, Moon, M-S, Kim, S-H, Park, S-H, Shon, I-J
• Format: Article
• Language: English
• Subjects: Cemented carbides; Composite materials; Density; Grain growth; Grain size; Hard material; Hard materials; High energy ball milling; High frequencies; Mechanical milling; Mechanical properties; Nanocomposite; Nanocomposites; Nanomaterials; Nanostructure; Oxidation; Powder metallurgy; Sintering; Sintering (powder metallurgy); Tungsten carbide; WC hard material
• ISSN: 1066-7857; 0267-0836; 1753-5557; 1743-2847
• DOI: 10.1179/175355511X13240279340804

Development of nanosized hard materials is desirable to improve the mechanical properties, and high energy mechanical milling (HEMM) method is widely used to fabricate nanosized powders. However, grain growth occurs during conventional sintering for long periods, which degrades the mechanical properties. In this work, high frequency induction heated sintering (HFIHS) was used to fabricate highly dense nanosized WC-10 vol.-% Nicrobraz 30, 150 and LC composites for short sintering time without grain growth. Therefore, control of grain growth during sintering is one of the keys to the commercial success of nanostructured cemented carbide composites. After sintering, the relative densities of WC-10 vol.-% Nicrobraz 30, 150 and LC composites were 99·9, 98·7 and 98·0% respectively. The grain sizes were confirmed by full width at half maximum from the result of X-ray diffraction. The highly dense nanosized WC-10 vol.-% Nicrobraz 30, 150 and LC composites were fabricated successfully using HEMM and HFIHS equipment.