日時 ： ２０１０年３月１２日（金）※16：30～
場所 ： 愛媛大学総合研究棟Ⅰ 4F 共通会議室（理学部構内）
要 旨
The elastic properties of materials under hydrostatic pressure have been studied by the measurement of ultrasound velocity using a gas pressure. The elastic velocities in nano-polycrystalline diamond (cubic, cubic + hexagonal + graphite), and sintered diamond were measured up to 0.1 GPa and to 500℃. These conditions of pressures and temperatures is useful for studying the properties of materials. Both the longitudinal and transverse elastic velocities of sample were obtained from analyzing the elastic wave signals by a pulse echo overlap method and resonance method. The bulk modulus, rigidity and Young's modulus are determined from the velocities. Pressure and temperature dependencies are derived.
問い合わせ先：土屋 卓久 TEL （089）927-8198
E-mail takut@sci.ehime-u.ac.jp
