In recent years, compound and fireproof material already made the metal the heat of research, in if wait for Si, Al and Fe,introducing fireproof material, research developed carbon of cup of Si-Si3N4- corundum qualitative pottery and porcelain, Al- - corundum qualitative slide and Fe-AlN-MgO- Si3N4 composite material, some already aborning received promotion application, obtained satisfactory result, be worth what carry is, although Si is not a metal, but extend the feature such as gender and plasticity because of what its have a metal, constant its in classify metal stuff.
The metal is compound and fireproof material
Consider to be informed: Once the metal serves as a group yuan compound in fireproof material, its are divided have outside corresponding compound is formed to enhance the base material that add pliable but strong below proper atmosphere, still have plasticity photograph to shape, stimulative agglomeration and fight the action such as oxidation.
The metal is in the action in fireproof material:
Plasticity photograph shapes: The metal can produce slippage in the crystal lattice below stress action, have plasticity feature, in introducing its fireproof material, relative to Yu Jian's hard inorganic material grain, in shape its shape play plasticity in the process characteristic, make in shape identically the green compact density of the preparation below pressure relatively what did not add metallic sample is tall.
Stimulative agglomeration: The metal can be attributed to two respects element to the hurried agglomeration action of fireproof material: One of, the plasticity photograph that introduces a metal to form shapes the density that can increase base substrate, shorten the distance between grain, the energy that expresses quality place to need diffuses in reducing fire process; Secondly, metallic melting point is general under fireproof material raw material, its can make fluid appearance below inferior temperature, the agglutinant flow of the capillary force that fluid photograph forms and its itself accelerated atomic migratory rate and base substrate are contractive, those who promoted agglomeration is compact change a course.
Improve tenacity: The metal can pass the mechanism such as deflexion of crackle bridge couplet, crackle and crackle protective screen to improve the tenacity of composite material, among them crackle bridge couplet is the effective mechanism that add pliable but strong, expand when crackle namely when the interface of metallic stuff and base material, because of metallic grain extend a gender, crackle makes its suffer force to spin, its will bring to bear on in the fluctuation surface of crackle stress of couplet of a bridge, can prevent crackle on one hand stretch and reduce the intensity factor with most advanced crackle, still can follow crackle additionally stretch and produce plasticity to be out of shape, wasted the energy with most advanced crackle, have the effect that add pliable but strong.
Fight oxidisability: Carbon is compound and fireproof material makes as a result of carbolic existence its have advantageous heatproof shake gender and the sex that fight broken bits, but the limitation that is put in easy oxidation however, once carbon is oxidized, the advantage that its have will lose almost to use up. To fill cent produces carbon the advantage of compound and fireproof material, often fight oxidisability through adding proper additive to raise its. The metal because function is lively, wait for reaction with O2 and CO easily, already used as antioxidant in fireproof material, often with what make antioxidant Al, Si, Mg and corresponding alloy wait.
Former reaction generates blame oxide: Introduce the metal fireproof material, in fire process, use its and raw material constituent or the aeriform reaction all round to generate metalloid enhance the appearance that add pliable but strong, can achieve improvement matrix normal temperature and high temperature capability and fruit of equivalent of heatproof shake sex. Current, this technology already got wide attention.
By above knowable, the metal is added in fireproof material, the mechanical function to fireproof material and fight oxidisability to waited to all have positive effect, this is adumbrative they have wide applied perspective in fireproof material. As the ceaseless breakthrough of the ceaseless development of science and technology and scientific domain, the function of compound and fireproof material will optimize the metal ceaselessly, its apply limits to also will expand further.
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