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采用最大气泡压力法测量表面张力,研究了温度和混合稀土(RE)加入量对ZM5表面张力的影响。结果表明:由于稀土的表面活性作用,在相同温度下,混合稀土加入量增加,ZM5镁合金熔体的表面张力减小,且减小趋势趋于平缓;同种成分熔体的表面张力随温度升高而降低,高温段的扩散作用增强,造成高温段的表面张力温度系数(-dσ/dt)小于低温段;混合稀土加入量对合金表面张力温度系数也有影响,随着混合稀土加入量的增加ZM5的表面张力温度系数减小。
The maximum bubble pressure method was used to measure the surface tension. The effects of temperature and RE content on the surface tension of ZM5 were investigated. The results show that due to the surface activity of rare earth, the addition of mischmetal increases at the same temperature, the surface tension of ZM5 magnesium alloy melt decreases, and the decreasing trend tends to be gentle. The surface tension of the melt of the same composition varies with the temperature (-dσ / dt) of the high temperature section is less than that of the low temperature section; the amount of mixed rare earths also affects the temperature coefficient of the surface tension of the alloy, and with the addition of the mixed rare earth Increasing the surface tension of ZM5 reduces the temperature coefficient.