Effect of Interlayer Thickness on Mechanical Properties of Nicalon-Fiber-Reinfored SiC Composites

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J. Korean Ceram. Soc. > Volume 30(7); 1993 > Article

Journal of the Korean Ceramic Society 1993;30(7): 549.

Nicalon 섬유강화 SiC 복합재료에서 섬유 Coating층의 두께가 기계적 성질에 미치는 영향

김민수, 김영욱¹, 이준근¹, 정덕수¹

연세대학교 공과대학 세라믹공학과
¹KIST 구조세라믹스연구실

Effect of Interlayer Thickness on Mechanical Properties of Nicalon-Fiber-Reinfored SiC Composites

ABSTRACT

Interfacial shear strength plays an important role in determining the mechanical properties of a fiber-reinforced ceramic composites. In this study, the effect ofinterlayer thickness on mechanical properties of Nicalon-fiber-reinforced SiC composites fabricated via polymer solution infiltration/chemical vapor infiltration (PSI/CVI) was studied. It was found that the flexural strength and fracture toughness of the composites were increased with the interlayer thickness and showed maximum value at the interlayer thickness of 0.66${mu}{textrm}{m}$. Typical flexural strength and fracture toughness of Nicalon-fiber-reinforced SiC composites with interlayer thickness of 0.66${mu}{textrm}{m}$ were 391.7$pm$34.6MPa and 15.1$pm$1.8MPa.m1/2, respectively.