Wetting Properties of Molten Iron Alloy at High-Pressure

所提出的实验是确定熔融铁合金在钙钛矿和镁铁矿固体基质中的润湿行为。这些实验将研究下地幔矿物对熔融铁合金渗流的影响。研究结果将对地球和行星核心形成的模型产生重要的限制。将使用三种实验策略：（1）在多砧装置中在亚固相线、高压条件（~ 20 GPa）下平衡来自宅基地L5球粒陨石的（Mg，Fe）SiO 3-钙钛矿、镁铁矿和熔融铁合金。晶体-晶体-液体界面的二面角将在淬火运行产品上测量，以量化晶界润湿和合金熔体连通性。(2)在16-20 GPa压力范围内的亚固相线温度下平衡CaSiO 3-钙钛矿、镁橄榄石和熔融铁合金的合成混合物。这些实验将提供对二面角测量和织构平衡的交叉检查。(3)在无硫体系中，对钙钛矿+镁铁矿的润湿角进行了实验研究。这些实验将为合金成分与润湿角行为之间的关系提供新的数据。

9628220 Agee The proposed experiments are to determine the wetting behavior of molten Fe-alloy in perovskite and magnesiowuestite solid matrices. These experiments will investigate the influence of lower mantle minerals on molten Fe-alloy percolation. Results will place important constraints on models of Earth and planetary core formation. Three experimental strategies will be used: (1) Equilibrate (Mg,Fe)SiO3-perovskite, magnesiowuestite, and molten Fe-alloy in a multi-anvil device at subsolidus, high-pressure conditions (~ 20 GPa), from Homestead L5 chondrite. Dihedral angles of crystal-crystal-liquid interfaces will be measure on quenched run products to quantify grain boundary wetting and alloy melt connectivity. (2) Equilibrate synthetic mixtures of CaSiO3-perovskite, magnesiowustite, and molten Fe-alloy at subsolidus temperatures in the pressure range 16-20 GPa. These experiments will provide a cross check on the dihedral angle measurements and textural equilibrium. (3) Experiments will be done to examine the wetting angle of perovskites + magnesiowuestite in a sulfur-free system. These experiments will offer new data on the relationship between alloy composition and wetting angle behavior.