Inorganic Polymer Matrix Composite Strength Related to Interface Condition

Materials

Donald W. Radford¹  Andrew Grabher¹ 

[1] Composite Materials, Manufacture and Structures Laboratory, Mechanical Engineering, Colorado State Universtiy, Fort Collins, 80523-1374 Colorado, USA; E-Mail:

关键词: geopolymer;    inorganic polymer;    ceramic matrix composite;    engine valve;   

DOI  :  10.3390/ma2042216

来源: mdpi

【 摘 要 】

Resin transfer molding of an inorganic polymer binder was successfully demonstrated in the preparation of ceramic fiber reinforced engine exhaust valves. Unfortunately, in the preliminary processing trials, the resulting composite valves were too brittle for in-engine evaluation. To address this limited toughness, the effectiveness of a modified fiber-matrix interface is investigated through the use of carbon as a model material fiber coating. After sequential heat treatments composites molded from uncoated and carbon‑coated fibers are compared using room temperature 3-point bend testing. Carbon‑coated Nextel fiber reinforced geopolymer composites demonstrated a 50% improvement in strength, versus that of the uncoated fiber reinforced composites, after the 250 °C postcure.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.