Siliconized graphite yog ib yam khoom sib xyaw uas silicon carbide txuas rau ntawm qhov chaw ntawm graphite substrate. Nws muaj cov yam ntxwv ntawm kev tawv siab, lub zog siab thiab kev tiv taus hnav ntawm silicon carbide, nrog rau cov yam ntxwv ntawm tus kheej-lubricating thiab thermal shock tsis kam ntawm graphite. Nws yog cov ntaub ntawv sib txhuam zoo tagnrho thiab cov ntaub ntawv foob kho tshuab, tsim nyog rau kev sib khi tshuab ntawm ntau yam twj tso kua dej, twj tso kua roj, twj tso kua tshuaj, thiab cov kabmob ntawm ntau yam twj tso kua dej ceev thiab siab-load tseem ceeb. Tsis tas li ntawd, siliconized graphite muaj kev tiv taus oxidation zoo, thermal shock tsis kam, porosity qis, thiab qee qhov kev coj hluav taws xob, thiab tuaj yeem siv ua cov ntaub ntawv xws li hlau smelting crucibles thiab cov kav dej.
Cov khoom sib xyaw ua ke ntawm siliconizedgraphite yog sib xws, qhov saum npoo yog sib xws nrog sab hauv, thiab qhov sib piv ntawm silicon carbide thiab graphite tuaj yeem hloov kho tau. Qhov siab dua ntawm cov ntsiab lus ntawm silicon carbide, qhov ntau dua qhov ceev ntawm cov khoom siv, qhov siab dua qhov compressive zog, thiab qhov resistivity nce.
Daim duab metallographic ntawm siliconizedgraphite
(qhov dub yog graphite, qhov grey yog silicon carbide, thiab qhov dawb yog silicon)
| 硅化石墨主要技术指标 | |
| 类别 Khoom | 指标 Tus nqi |
| 密度 Qhov Ceev | 2.4-2.9g/cm³ |
| 孔隙率 Qhov porosity | <0.5% |
| 抗压强度Lub zog compressive | >400MPa |
| 抗折强度 Lub zog flexural Lub zog flexural | >120MPa |
| 热导率 Kev ua kom sov tau zoo | 120W/mK |
| 热膨胀系数Cov coefficient ntawm kev nthuav dav thermal | 4.5 × 10-6 |
| 弹性模量Cov qauv elastic | 120GPa |
| 冲击强度Lub zog cuam tshuam | 1.9KJ/m² |
| Dej lubricated kev sib txhuam | 0.005 |
| 干摩擦系数Cov coefficient ntawm kev sib txhuam qhuav | 0.05 |
| 化学稳定性 Kev ruaj khov tshuaj lom neeg | 各种盐，有机溶剂，强酸(HF, HCl, H₂SO4,HNO₃) Ntau yam ntsev, cov organic solvents, cov kua qaub muaj zog (HF, HCl, H₂SO4)4,HNO₃) |
| 长期稳定使用温度 Kub siv ntev ntev | 800 ℃ (氧化气氛), 2300 ℃ (惰性或真空气氛) 800 ℃ (cua oxidizing), 2300 ℃ (inert lossis nqus tsev) |
| 电阻率 Kev tiv thaiv hluav taws xob | 120 × 10-6Ωm |
