硬质合金热物性参数.pdf

物理性能对比 Physical Properties Comparison物理性能Physical PropertiesAstek S-SiC反应烧结SiCRB-SiC硬质合金WC氧化铝陶瓷Al2O3组 成CompositionSiC(99%)SiC+10%SiWC+6%CoAl2O3(99%)密 度, g/cm3Density3.10 ± 0.033.0014.503.93弹性模量 , GPa Modulus of Elasticity410360400380Knoop 硬度Hardness Knoop2800270018802200抗弯强度 , MPa (kpsi) Bend Strength380(55)338(49)570(83)300(43)抗压强度 , MPa (kpsi) Compression Strength3970(560)1120(158)7900 (1140)3450(500)断裂韧性 , MPa ·m1/2 Fracture Toughness44.5122.5热膨胀系数 , 1/0k Thermal Expa. Coeff.4×10-65.0×10-6NA7.6×10-6热传导率 , W/m ·0k Thermal Conductivity1209511020常温比热 , Joule/g·0k Specific Heat@RT0.670.800.950.90常温下最大使用温度, ℃Max. Use Temp. in Air150012009001400耐腐蚀性比较 Corrosion Test Results测试环境 * Test Environment* 腐蚀重量损失，毫克/平方厘米 /年Corrosive Weight Loss，mg/cm2/yr 试剂浓度Concentration Reagent, Wt%测试温度Temperature Astek S-SiC反应烧结 SiCRB-SiC (10% Free SiC) 硬质合金WC(6% Co) 氧化铝陶瓷Al2O398% H2SO4100℃1.5 50.0 >1 65.0 50%NaOH 100℃2.5 > 1000 5.0 75.0 53%HF 100℃ 1000 70% HNO3100℃1000 7.0 45% KOH 100℃ 1000 3.0 60.0 25%HCl 100℃ 1000 > 1000 16.0 *浸没于试剂中125-300小时并不断搅动*125-300 hours of submersive testing, continuously stirred.。