The contact angles of two different systems, molten silicon and a eutectic Si-8 at. pct Zr alloy and their evolution over timeon vitreous carbon and polycrystalline silicon carbide (SiC) substrates were investigated at 1500°C under vacuum, as well as in argon using the sessile drop technique. The contact angle and microstructure of the liquid droplet/solid substrate interface were studied to understand fundamental features of reactive wetting as it pertains to the infiltration process of silicon and silicon alloys into carbon or C/SiC preforms. Both pure Si and theeutectic alloy showed good wettability onvitreous carbon and SiC characterized by equilibrium contact angles between 29° and 39°. Theeutectic alloy showed a higher initial contact angle and slower spreading as compared to that of pure Si. On vitreous carbon bothsilicon and the eutecticalloy formed SiC at the interface, while no reaction was observed on the SiC substrates.

两种不同系统的接触角：熔融硅和共晶Si-8 at。研究了pct Zr合金及其在玻璃碳和多晶碳化硅（SiC）衬底上随时间的演变，分别在1500°C和真空下以及在氩气中使用sessile drop技术在玻璃中进行了研究。研究了液滴/固体基质界面的接触角和微观结构，以了解反应性润湿的基本特征，因为它涉及硅和硅合金向碳或C / SiC预成型物中的渗透过程。纯Si和共晶合金均对玻璃态碳和SiC表现出良好的润湿性，其平衡接触角在29°至39°之间。与纯Si相比，共晶合金显示出更高的初始接触角和更慢的扩展。