摘要
Forinitiativeapplicationofnon-oxidesinrefractories,itisessentialtostudythermodynamicpropertiesofnon-oxides.Thestabilityandstableorderofnon-oxidesunderoxidizedatmosphereareanalyzedfirstlyandthenanewprocess,"conversereactionsintering",isproposed.Theresultsofstudyonoxidationmechanismofsiliconandaluminumnitridesindicatethatthegaseoussuboxidescanbeproducedobservablywhentheoxygenpartialpressureislowerthan"conversionoxygenpartialpressure".Thesuboxidescanbedepositednearthesurfaceofcompositetobecomeacompactlayer.Thiscausesthematerialpossessingaperformanceof"self-impedientoxidation".MetalSiandAlarethebetteradditivesforincreasingthedensityandwidthofcompactlayerandincreasingtheabilityofanti-oxidationandanti-corrosion.ThestudyonSi3N4-Al2O3,Si3N4-MgO,Si3N4-SiCsystemsisalsoenumeratedasexamplesinthepaper.TheexperimentalresultsshowthattheconversereactionsinteringisabletomakehighperformancecompositesandmetalSiandAlnotonlycanpromotethesinteringbutalsoincreasethedensityandwidthofcompactlayer.
出版日期
2005年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
