Cov khoom ntawm Nitrogen Carbon Bonded Silicon Carbide Khoom
Tus txheeb ze molecular loj ntawm nitrogen-carbon bonded silicon carbide khoom yog 140.28; grey, dawb los yog dawb; hexagonal; hexahedral; ceev 3,44; Melting point 1900 degree (hauv siab). Feem ntau decomposes ntawm 1900 degree nyob rau hauv ib txwm siab. Qhov tshwj xeeb kub muaj peev xwm yog 0.71J / (g·K). Qhov kub ntawm kev tsim yog -751.57kJ/mol. Lub thermal conductivity yog 16.7W / (m·K).
Lub linear expansion coefficient ntawm nitrogen-carbon bonded silicon carbide khoom yog 2.75 × 10-6 / degree (20 ~ 1000 degree); Nws yog insoluble hauv dej thiab soluble hauv hydrofluoric acid. Qhov kub ntawm qhov oxidation pib hauv huab cua yog 1300 ~ 1400 degree, thiab qhov tshwj xeeb ntim kuj yog 1.4 × 105 ·m ntawm 20 degree thiab 4 × 108 ·m ntawm 500 degree. Lub elastic modulus yog 28420 ~ 46060MPa. Lub zog compressive yog 490 MPa (kev tshwm sim sintered). Ntawm 1285 degree, nws reacts nrog dicalcium dinitride los tsim calcium silicide, thiab ntawm 600 degree, cov hlau hloov pauv yog txo thiab nitrogen oxides raug tso tawm.
Lub zog flexural ntawm nitrogen-carbon bonded silicon carbide khoom yog 147MPa; nws tuaj yeem npaj tau los ntawm cua sov silicon hmoov hauv nitrogen los yog los ntawm reacting silicon halide nrog ammonia; nws tuaj yeem siv los ua cov khoom siv kub kub ceramic. Silicon nitride ceramic cov ntaub ntawv muaj cov thermal stability, muaj zog oxidation tsis kam thiab siab qhov tseeb ntawm cov khoom.
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