1. Fa'amatalaga Fa'amatalaga ma Mea Fa'avae ole Silicon Carbide
1.1 Polymorphism ma Atomic Bonding i SiC
(Silicon Carbide Papatusi Ceramic)
Silicon carbide (SiC) o se mea sima covalent e faia i le silikoni ma carbon atoms i le a 1:1 fua faatatau stoichiometric, iloa e lona polymorphism tulaga ese– ua uma 250 polytypes iloa– o lo'o fa'asoa uma fa'atasiga mautu fa'atonuga fa'atasi ae e fesuisuia'i i fa'aputuga fa'aputuga o Si-C bilayers.
O se tasi o polytypes sili ona talafeagai o le 3C-SiC (fa'ava'a fa'afefiloi o le zinc kupita), ma ituaiga hexagonal 4H-SiC ma le 6H-SiC, o lo'o fa'aalia uma suiga ma'ale'ale ile va o fusi, fe'avea'i eletise, ma le fa'avevela vevela e a'afia ai lo latou talafeagai mo fa'amatalaga fa'amatalaga.
O le faigata o le Si– C noataga, fa'atasi ai ma se malosi fa'amau e tusa 318 kJ/mol, faʻavaeina le mausali o le SiC (Mohs malosi o le 9– 9.5), maualuga liusuavai vaega (~ 2700 °C), ma le tetee atu i le faaleagaina o vailaau ma le te'i vevela.
I ipu sima, o le polytype e masani ona filifilia e faʻatatau i le faʻaaogaina: 6H-SiC e manumalo i tusi faufale ona o se taunuuga o lona faigofie o le faʻasologa, a'o le 4H-SiC e fa'atonu i mea fa'aeletonika maualuga mo lana nofoa fa'ata'avalevale e tu'uina atu totogifuapauina.
O le vavao lautele (2.9– 3.3 eV fa'atatau ile polytype) e fa'aopoopoina ai le SiC o se insulator eletise tulaga ese i lona ituaiga mama, e ui lava e mafai ona doped e galue o se semiconductor i meafaigaluega numera faapitoa.
1.2 Fa'ameamea laiti ma le tulaga mama i totonu o Papatusi Sima
O le fa'atinoga o ipu sima carbide silicon e matua fa'alagolago lava ile microstructural features e pei ole saito tele, mafiafia, tulaga tutusa, ma le i ai o vaega fa'aopoopo po'o fa'aleagaina.
O papatusi maualuga e masani lava ona gaosia mai le submicron poʻo le nanoscale SiC paʻu faʻatasi ai ma auala faʻapipiʻi faʻapitoa., mafua ai fatu lelei, microstructures mafiafia atoatoa e faʻateleina le malosi faʻainisinia ma le vevela.
Fa'aleagaina e pei ole kaponi fa'afetai, silika (SiO LUA), po'o le sintering fesoasoani pei o boron po'o alumini mama mama e tatau ona fa'atulafonoina lelei, aua e mafai ona latou fausia ata intergranular e faʻaitiitia ai le maualuga o le vevela ma le faʻamaʻiina.
Porosity faifaipea, fa'apea fo'i i tikeri fa'aititia (
Advanced Ceramics na faavaeina ia Oketopa 17, 2012, o se pisinisi maualuga-tech tuuto atu i le suesuega ma atinae, gaosiga, faiga, fa'atauga ma 'au'aunaga fa'apitoa o mea tau sima e pei ole Silicon Carbide Ceramic Plates. O a matou oloa e aofia ai ae le gata i Boron Carbide Ceramic Products, Boron Nitride Ceramic Products, Silicon Carbide Ceramic Products, Silicon Nitride Ceramic Products, Zirconium Dioxide Ceramic Products, ma isi. Afai e te fiafia, faamolemole lagona le saoloto e faafesootai matou.
Fa'ailoga: ipu carbide silikon,ipu carbide,laupepa silikoni carbide
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