Abstract
Polymer-derived Nicalon SiC fiber produced commercially has been widely applied in high temperature Ceramic Matrix Composites (CMCs). Recently, SiC fiber with a low oxygen content (Hi-Nicalon) was developed and produced commercially using an electron beam curing. This fiber has a higher elastic modulus and creep resistance, and much higher thermal stability up to 1600 ° C than that of Nicalon fiber. High temperature mechanical properties of CMCs with Hi-Nicalon have much improved. However, creep and oxidation resistance of Hi-Nicalon CMCs are not satisfactory for high temperature structural materials, because Hi-Nicalon mainly consists of SiC micro-crystals and excess carbon. Therefore, we have developed an SiC fiber (Hi-Nicalon type S) with stoechiometric SiC composition and high crystallinity. Hi-Nicalon S fiber has high elastic modulus (420 Gpa), good oxidation resistance at 1400 °C, and excellent creep resistance. In this paper, the recent development of these oxygen free SiC fibres including physical and mechanical properties, thermal stability and an environmental resistance are reported.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
