Abstract

The structural and physicochemical properties (density and surface tension parameters) of the nickel melt containing a detrimental impurity (oxygen) in an amount of 0.01, 0.02, and 0.03 wt % of the pure nickel content are studied. The temperature dependences of the density of melts of the Ni–O system are characterized by higher values relative to the pure solvent and compression effect formation. Oxygen in the nickel melts possesses a high surface activity and also affects an increase in the surface tension under the heating conditions. The amount of oxygen adsorbed on the surface depends on the temperature and melting conditions. Under the heating and cooling conditions, the amount of the adsorbed substance at low temperatures is approximately twofold higher than that at high temperatures. In a content range of 0.018 wt % oxygen, the surface tension isotherms contain a minimum, the adsorption isotherms contain a maximum, and the density isotherms exhibit inflection points of the function. The appearance of specific points in the curves of the structure-sensitive properties makes it possible to predict the possibility of a structural transition caused by the decomposition of an oxygen-saturated γ-like liquid solution to a γ solution and microgroups of NiO oxide.

中文翻译：

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镍氧熔体的密度，表面张力和性质

摘要

研究了含有纯镍含量的0.01、0.02和0.03 wt％的有害杂质（氧）的镍熔体的结构和物理化学特性（密度和表面张力参数）。Ni-O系统熔体密度的温度依赖性特征在于相对于纯溶剂和压缩效应形成而言，其值较高。镍熔体中的氧气具有很高的表面活性，并且还影响加热条件下表面张力的增加。吸附在表面上的氧气量取决于温度和熔化条件。在加热和冷却条件下，低温下的吸附物质的量大约是高温下的两倍。在氧气含量为0.018 wt％的范围内，表面张力等温线包含最小值，吸附等温线包含最大值，并且密度等温线显示功能的拐点。在结构敏感性特性曲线中特定点的出现使得可以预测由氧饱和的γ状液体溶液分解为γ溶液和NiO氧化物的微基团引起的结构转变的可能性。