T. Hinoki et al., EFFECT OF FIBER COATING ON INTERFACIAL SHEAR-STRENGTH OF SIC SIC BY NANO-INDENTATION TECHNIQUE/, Journal of nuclear materials, 263, 1998, pp. 1567-1571
Citations number
12
Categorie Soggetti
Nuclear Sciences & Tecnology","Mining & Mineral Processing","Material Science
In order to quantitatively evaluate mechanical properties of fibers, m
atrices and their interfaces in fiber reinforced SiC/SiC composites, f
iber push-out tests have been carried out. From the indentation load v
s. displacement relations, the fiber push-out process has been discuss
ed in comparison with the C/C composites and the loads for fiber push-
in and those for fiber push-out were estimated. The trends of load-dis
placement curve of fiber push-out process depended on specimen thickne
ss. The curve in the case of thick specimen had a micro step indicatin
g fiber push-in and a larger step corresponding to fiber push-out. How
ever just a larger step indicating fiber push-out was seen without fib
er push-in process in the case of thin specimen. Interfacial shear str
ess was discussed and defined in both cases. The effects of fiber coat
ings on interfacial shear stress obtained from thin specimens were ana
lyzed. The relationship between bending stress and interfacial shear s
tress of SiC(pcs)/SiC(CVI) is preliminarily postulated together with m
icrostructural characteristics of the composites. (C) 1998 Elsevier Sc
ience B.V. All rights reserved.