Effects of Oxygen Content on the Properties of Ultra-High-Temperature Resistant Si-Al-C Fibers

Da Fang Zhao; Xiao Dong Li; Hao Wang; Chun Man Zheng; Hai Zhe Wang

doi:10.4028/www.scientific.net/KEM.368-372.1774

Paper Titles

Properties and Microstructure of an HfB₂-HfC-SiC Ultra High Temperature Ceramics
p.1761

Effect of Iron Additive on the Sintering Behavior of Hot-Pressed ZrC-W Composites
p.1764

Combustion Synthesis of Si₃N₄ from Si/NH₄Cl at Low Nitrogen Pressure
p.1767

Preparation and Properties of 2D C/SiC-TaC Composites
p.1771

Effects of Oxygen Content on the Properties of Ultra-High-Temperature Resistant Si-Al-C Fibers
p.1774

Processing and Characterization of Ultra-High Temperature Oxide Fiber-Reinforced Oxide Ceramic Matrix Composites with Improved Thermomechanical Properties
p.1778

Thermal Shock Resistance of Ultra-High Temperature Ceramics
p.1782

Fracture Strength of Ultra-High Temperature Ceramics
p.1785

Microstructure and Mechanical Properties of High Density PCBN Aggregates
p.1788

HomeKey Engineering MaterialsKey Engineering Materials Vols. 368-372Effects of Oxygen Content on the Properties of...

Effects of Oxygen Content on the Properties of Ultra-High-Temperature Resistant Si-Al-C Fibers

Abstract:

Ultra-high-temperature resistant Si-Al-C fibers derived from polyaluminocarbosilane were prepared by the procedures of melt-spinning, air curing and heated at 1800°C. It was found that oxygen content in the cured fibers has great influences on the chemical composition of the Si-Al-C fibers and its crystalline behavior during sintering. When oxygen content of cured fibers was too high, crystallite grains in the fiber would grow up. Oxygen evolvement in the fiber during the preparation was studied in detail by chemical analysis. It was found that oxygen is liberated mainly as CO gas from 1300°C to1600°C.