Wetting behavior and reactivity of liquid Si-10Zr alloy in contact with glassy carbon

JOURNAL OF ALLOYS AND COMPOUNDS

卷:822

Article

Giuranno, Donatella^1,2  Polkowska, Adelajda²  Polkowski, Wojciech²  Novakovic, Rada¹ 

[1] Natl Res Council Italy, Inst Condensed Matter Chem & Technol Energy, Via Marini 6, I-16149 Genoa, Italy

[2] Foundry Res Inst, Lukasiewicz Res Network, Zakopianska 73 Str, PL-30418 Krakow, Poland

关键词: Silicon carbide;    Metal matrix composites;    Liquid Si-based alloys;    Refractory materials;   

DOI  :  10.1016/j.jallcom.2020.153643

来源: Elsevier

【 摘 要 】

In designing advanced refractory composites for highly demanding applications, reactive infiltration of liquid Si-enriched Si-Zr alloys into C-or SiC-based preforms may be a viable cost-less manufacturing process. In such cases, in view to optimize liquid assisted processes such as reactive infiltration, fundamental investigations of the interfacial phenomena occurring when the liquid Si-Zr alloys are in contact with C and SiC substrates, are key steps. For this reason, aiming to mimic the conventional operating conditions imposed within a reactive infiltration process, the contact heating sessile drop method was applied to perform a basic study concerning the interaction phenomena taking place at the interface of Si-10% at Zr alloy/Glassy Carbon substrate under an Ar atmosphere. Specifically, the contact angle values as a function of time were measured in the temperature range of 1354-1500 degrees C. The final contact angle values decreased slightly with an increase in temperature.Moreover, at T = 1450 degrees C, the contact angle increased over a larger time interval before reaching its final value. The kinetics of SiC crystal growth at the interface and the related processing parameters such as temperature and time were carefully analysed. The growth of SiC crystals and their packaging phenomenon are time and temperature-dependent phenomena. (C) 2020 The Authors. Published by Elsevier B.V.

【 授权许可】

Free