Kinetics of Metal‐Ceramic Composite Formation by Reactive Penetration of Silicates with Molten Aluminum

摘要: Wetting and reactions between molten Al silicate substrates (particularly mullite) are studied to determine both how substrate tensity p(O2) influence wetting behavior, reaction rates, composition, product microstructure what key steps control penetration kinetics. Guidelines provided for using reactive or infiltration when fabricating metal/ceramic composites. For dense substrates, a process occurs. certain range, the chemical ceramic is limiting kinetic step resulting in fast rates. Maximum mullite rates 1000° 1200°C independent of p(O2), unlike fused silica, which has faster at higher temperatures. mullite, layer evolution halts porous alone Either critical temperature must be reached before starts.