基于压力烧结法的小尺寸人工冰样制备工艺研究

Preparation of the small-size artificial ice sample with the pressure sintering method

摘要:

小尺寸人工冰样主要用于冰的力学特性研究，具有制备程序简单、周期短、成本低、不受季节和地域限制等优点。本文在-3.5~-17.3 ℃温度和10~100 MPa压力条件下开展了雪压力烧结实验研究，采用压力烧结法制备了小尺寸人工冰样，其结果揭示了烧结应力和烧结时间对雪压力烧结过程中的密度演化和冰样最终烧结密度的影响，得出使用压力烧结法来制备冰样时可以选择长时间、低应力、近融点温度或短时间、高应力、低温度的条件，来制备密度为0.917 g/cm³的人工冰样。实验结果验证了压力烧结法制备人工冰样的的可靠性和可重复性，为冰力学特性实验提供了一套切实可行的小尺寸人工冰样制备工艺。

Abstract:

Small-size artificial ice samples are widely used for ice mechanical properties research， and have the advantages of simple preparation procedures， short duration， low cost， and no seasonal and geographic restrictions. In this paper， the snow pressure sintering experiment was carried out under the conditions of -3.5~-17.3℃ and 10~100MPa， and small-size artificial ice samples were prepared by the pressure sintering method. The results reveal the influence of sintering stress and sintering time on the density evolution during the snow pressure sintering process and the final sintered density of the ice sample. It is concluded that with the pressure sintering method， artificial ice samples with a density of 0.917g/cm³ can be prepared under either of the conditions： a long time， low stress， and near melting point temperature， or a short time， high stress， and low temperature. The experimental results have verified the reliability and repeatability of artificial ice sample preparation with the pressure sintering method and provide a practical and feasible small-size artificial ice sample preparation technique for the experiment of ice mechanical properties.