高温条件下材料固体桥力的测量

Measurement of Solid-bridge Force at High Temperatures

本文搭建了高温条件下材料固体桥力的测量系统,该系统最高温度可达1600℃,可测量材料在不同温度、压力及接触时间下的固体桥力。本文中采用玻璃为固体材料,对其熔点附近温度范围内的固体桥力进行了测量。实验结果显示,材料抗拉强度及脖颈抗拉强度均随着温度的升高而减小;通过与常温石蜡材料所获得的固体桥力计算公式进行对比,二者在数量级上相符合,绝对值偏差不超过38%,且明显优于传统的固体桥力估算方法。

An experimental system for solid-bridge force measurement at high temperatures was built.The maximum temperature of the system can reach 1600 ℃.The solid-bridge force can be measured at different temperatures,pressures and contact times.The material used in this study was glass,and the solid-bridge force in the vicinity of its fusion temperature was measured.It was found that the material tensile strength and tensile strength of sintered neck both decrease with the increase of temperature.The results calculated using the function of paraffin tensile strength were of the same order of magnitude as the experimental results.