著者

武部 博倫 亀田 常治 小松 通泰 米屋 勝利 森永 健次

出版者

社団法人 日本セラミックス協会

雑誌

Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) (ISSN:09145400)

巻号頁・発行日

vol.97, no.1122, pp.166-173, 1989-02-01 (Released:2010-08-06)

参考文献数

11

被引用文献数

9 15

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The single-phase region of AlON, a spinel type solid solution in the system Al2O3-AlN, has been determined. AlON was synthesized from solid phase reactions between Al2O3 and AlN powder in several reaction vessels. The reaction vessel of porous Al2O3 with AlN coating was suitable for obtaining pure AlON. The single-phase region of AlON was from 28 to 32mol% AlN at 1700°C and from 20 to 34mol% AlN at 1800°C. The lattice parameters of AlON increased from 7.926 to 7.946Å with increasing AlN content. Y2O3-powder was used as a sintering aid to obtain translucent AlON from synthesized AlON powder at low temperature. For 1wt% Y2O3 addition, the translucent AlON was obtained at 1800°C, and its relative density and flexural strength were 99% and 250MPa, respectively.

著者

伊藤 義康 亀田 常治 西田 勝利 梅澤 正信 今井 義一 市川 宏

出版者

社団法人 日本セラミックス協会

雑誌

Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) (ISSN:09145400)

巻号頁・発行日

vol.106, no.1236, pp.830-834, 1998-08-01 (Released:2010-08-06)

参考文献数

16

被引用文献数

2 2

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Toughness of ceramic-matrix composites can be optimized through coatings the reinforcing fibers. Chemical vapor deposition (CVD) process is a key technology for fiber coatings. The mechanical properties of continuous silicon carbide fibers (Hi-Nicalon) have been studied as a function of the thickness of the pyrolytic boron nitride (P-BN) coating by CVD process. The compressive residual stress at the P-BN coating layer decreases slightly with increasing the coating thickness. It is considered that, with including the residual stress effect, cracking of the P-BN coating layer occurs first in a monotonic tensile fracture test. In addition no degradation of the silicon carbide-fiber in ultimate tensile strength is observed regardless of the P-BN coating thickness.