ウエダ　ヨシオ   Ueda Yoshio   上田　良夫    所属   追手門学院大学  理工学部 電気電子工学科    職種   教授
言語種別	英語
発行・発表の年月	2017
形態種別	論文
査読	査読あり
標題	Longitudinal and shear wave velocities in pure tungsten and tungsten fiber-reinforced tungsten composites
執筆形態	共著・編著（代表編著を除く）
掲載誌名	Physica Scripta
掲載区分	国外
巻・号・頁	2017(T170)
国際共著	国際共著
著者・共著者	H. T. Lee,S. Ando,J. W. Coenen,Y. Mao,J. Riesch,H. Gietl,R. Kasada,Y. Hamaji,K. Ibano,Y. Ueda
概要	Longitudinal and shear wave velocities in pure tungsten and tungsten fiber-reinforced tungsten (Wf/W) composites were studied by laser ultrasonic measurements. The samples were produced from powders or powder/fiber mixtures by spark plasma sintering process. It was found that sintering temperature, as a processing parameter, has the largest effect. Higher sintering temperatures result in faster wave velocities. For example, longitudinal wave velocities and their standard deviations in sintered W at 1800 °C and 2000 °C were 4834 ± 53 m s−1 and 5043 ± 47 m s−1. In comparison, the average longitudinal wave velocity for a polycrystalline reference W was 5227 ± 5 m s−1. The values for Wf/W composites fall between the two sintered samples. However, the thicker Yttria (Y2O3) fiber/matrix interface resulted in faster wave velocities.
DOI	10.1088/1402-4896/aa89c7
ISSN	0031-8949/1402-4896