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勇任
Lv 7
勇任 asked in 科學化學 · 1 decade ago

想問一下~碳化鈦是不是比碳化鎢硬???

之前看一本書上面介紹硬度的分類~~上面寫碳化鈦比碳化鎢硬~~我就納悶了~那為什麼市面上切些工具還是只用到碳化鎢~卻沒用到碳化鈦?

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  • 1 decade ago
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      ç¢³åŒ–鈦 (TiC)性質

    An extremely hard and light refractory material with high thermal shock and abrasion resistance. It is used for powder metallurgical (P/M) parts including cutting tool tips, dies and wear parts and resistant coatings. It is also used as an additive to plastic & rubber parts to reduce wear and as an alternate to metal parts

    ·         低摩擦係數

    ·         導熱係數 @ 20 degrees Celsius: 041 cal/s-cm-degree C

    ·         線膨脹比率: .02% @ 600F and 0.8% @ 2000F

    ·         曲折強度: 60,000psi @ 70F and 35,000psi @ 2000 F

    ·         硬度: Knoop - 2470 / 莫氏 - 9

    ·         熔點: 5680 F / 分子量: 59.89

    ·         密度 (gm/cc): 4.9 - 5.2

     

    http://www.ppm.bc.ca/tic.htm

     

    碳化鎢 (WC)性質

    密度

    15.8 g·cm−3

    熔點

    2870 °C, 5198 °F (3143K)

    沸點

    6000°C, 10832 °F (6273K)

    導熱係數

    84.02 W·m−1·K−1

    抗張強度

    0.3448 GPa

    莫氏硬度

    9

    分子量

    195.86

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