Siliconized graphite yog cov khoom sib xyaw uas silicon carbide txuas rau saum npoo ntawm graphite substrate. Nws muaj cov yam ntxwv ntawm siab hardness, siab mechanical zog thiab hnav tsis kam ntawm silicon carbide, nrog rau nws tus kheej-lubricating zog thiab thermal shock kuj ntawm graphite. Nws yog ib qho zoo tagnrho cov ntaub ntawv sib txhuam thiab cov khoom siv foob, haum rau kev sib khi ntawm ntau yam twj tso kua mis, roj twj, tshuaj twj, thiab bearings ntawm ntau yam high-ceev thiab high-load lub ntsiab twj. Tsis tas li ntawd, siliconized graphite muaj qhov zoo oxidation tsis kam, thermal poob siab tsis kam, porosity tsawg, thiab qee yam hluav taws xob conductivity, thiab tuaj yeem siv los ua cov ntaub ntawv xws li hlau smelting crucibles thiab cov hlab ntsha.
Cov muaj pes tsawg leeg ntawm siliconizedgraphite yog ib yam, qhov saum npoo yog zoo ib yam nrog rau sab hauv, thiab muaj pes tsawg leeg ntawm silicon carbide thiab graphite yog adjustable. Qhov siab dua cov ntsiab lus ntawm silicon carbide, qhov ntau dua qhov ntom ntawm cov khoom, qhov siab dua lub zog compressive, thiab cov resistivity nce.
Metallographic duab 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 Yam khoom | 指标 Tus nqi |
| 密度 Qhov ntom | 2.4-2.9g / cm³ |
| 孔隙率 Porosity | <0.5% |
| 抗压强度Compressive zog | > 400MPa |
| 抗折强度 Flexural zog Flexural zog | > 120MPa |
| 热导率 Thermal conductivity | 120 W/mK |
| 热膨胀系数Thermal expansion coefficient | 4.5 × 10-6 |
| 弹性模量Elastic modulus | 120 GP ua |
| 冲击强度Kev cuam tshuam lub zog | 1.9 KJ/m² |
| Dej lubricated kev sib txhuam | 0.005 ib |
| 干摩擦系数Qhuav kev sib txhuam coefficient | 0.05 Nws |
| 化学稳定性 Tshuaj stability | 各种盐，有机溶剂，强酸(HF, HCl, H₂SO4HNO ₃) Ntau cov ntsev, cov kuab tshuaj organic, muaj zog acids (HF, HCl, H₂SO4HNO ₃) |
| 长期稳定使用温度 Lub sij hawm ntev ruaj khov siv kub | 800 ℃ (氧化气氛), 2300 ℃ (惰性或真空气氛) 800 ℃ (oxidizing cua), 2300 ℃ (inert lossis nqus cua) |
| 电阻率 Hluav taws xob resistivity | 120 × 10-6Ωm |
