Thermal expansion coefficient of titanium casting.
Thermal expansion coefficient of titanium casting.
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DOI：
10.1111/j.1365-2842.2001.00664.x
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发表时间：
2001-03
影响因子：
2.9
通讯作者：
D. Low;T. Sumii;M. Swain
中科院分区：
文献类型：
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作者：
D. Low;T. Sumii;M. Swain
对于金属烤瓷冠，需要可靠地测量热膨胀系数（α）值，以实现金属和瓷之间的正热失配。加热速率和试样条件可能会显着影响α值和这些因素的影响进行了研究。商业纯铸造钛棒，“铸造”和喷砂，在各种条件下加热。根据这项研究，当加热（冷却）速率降低到1 ℃ min（-1）时，加热和冷却条件之间的α值差异不显著。结果表明，应使用从1 ℃ min（-1）冷却速率获得的α值。α值低于8.5 × 10（-6）摄氏度的牙科瓷将适用于钛陶瓷应用。
A reliable measurement of the thermal expansion coefficient (alpha) value is required to achieve a positive thermal mismatch between metal and porcelain for porcelain-fused to metal crowns. Heating rate and specimen conditions may significantly influence the alpha value and the effects of these factors were studied. Commercially pure cast titanium rods, 'as cast' and sandblasted, were heated at various conditions. According to this study, the discrepancy of alpha values between heating and cooling conditions was insignificant when the heating (cooling) rate was reduced to 1 degrees C min(-1). It was revealed that alpha values obtained from 1 degrees C min(-1) cooling rates should be utilized. Dental porcelain with an alpha value lower than 8.5 x 10(-6) degrees C will be suitable for titanium-ceramic applications.