The Development Of Reinforced Organic-Inorganic High Malecule Compounds Sintered Alloies And The Research Of Their Submicrostructrue-Mechanical Properties

The rapid development of high technology requires advanced new materials as a firm base , but it is difficult for a single component material to meet the need . As we know, it is a new trend in current development of material industry to make new sintered alloies with high strengh , high modulus and high tempetature wearability by sintering the composites of organic polymers, inorganic materials and reinforcing materials.In this paper , α—SiC as an inorganic material, phenolic aldehyde and coal pitch as organic polymers, high modulus carbon fiber and its fabric as reinforcing materials were selected. And the semifinished products were shaped by the methods of "pre — blend forming* and "coating fabric and laminating* respectively, and sintered by the method of PLS and HP in the atmosphere of pure Argon. First for the time, a sinterd alloy of SiC/carbon reinforced by short carbon fibers with high strength , high modulus and high temperature wearabillty and a sintered alloy of SiC/carbon reinforced by carbon fiber fabric with oxidation resistance at high temperature were obtained. These new sintered alloies are very perspective materials. In this paper, the properties of the sintered alloies and their effect factors were studied from the angle of submicrostructure— properties relationship. Many new ideas about the sintered alloies were put forward.A new concept of "apparent activation energy manual" is first applied to the ther-mogravimetric analysis, and the thermodegradation machenism of phenolic aldehyde and coal pitch in different environment has been studied. the result shows that, the thermodegradation process was actived. but the curing reaction process was resisted in the phenolic aldehyde, while the polymerization process was actived, but the degradation processwas resisted in the coal pitch. In this paper, a new method improving the dispersivenss...