利用卧滴法(Sessile drop method)测定了液态Ni-P和Ni-Zr-P合金的表面张力以及熔体与Al_2O_3的润湿性,并用AES测定了磷在上述合金表面层中沿深度的分布。结果表明,磷在液Ni中为表面活性元素,当Ni中有少量Zr存在时,促进磷更加明显地降低液Ni的表面张力,磷在液Ni表面的最大吸附值与AES实测值相近.Ni-P熔体对Al_2O_3的润湿性与磷的含量有关;当合金中含有少量Zr时,其润湿性降低。此外,还测定了镍基合金与Al_2O_3界面的表观剪切强度。
The surface tension of liquid Ni-P and Ni-Zr-P alloys and their wettabilityonto Al_2O_3 substrates were measured by the sessile drop method. The distributionof P along the depth beneath the surface of the alloy was determined by AES.Results show that the P is a surface-active element in liquid Ni and the surfacetension of liquid Ni-base alloy is obviously decreased by the increasing of P con-tained when a small amount of Zr existed. The maximum adsorption value ofP on the liquid Ni surface is rather close to the measured value by AES. Thewettability of Iiquid Ni-P onto Al_2O_3 is concerned with the P content in the all-oys and decreases as less Zr contained in them. The apparent shearing strengthof the Ni-base alloys against Al_2O_3 substrate was also evaluated.
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