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A novel ternary nitride whisker: MgSiN 2 whisker and its growth mechanism
Author(s) -
Luo Yixin,
Ding Jun,
Yu Chao,
Liu Zhenglong,
Deng Chengji
Publication year - 2025
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.20480
Subject(s) - whisker , materials science , ternary operation , nitride , mechanism (biology) , composite material , mineralogy , chemistry , layer (electronics) , computer science , philosophy , epistemology , programming language
Abstract The MgSiN 2 whisker, as a novel ternary nitride, exhibits considerable potential as an advanced high‐temperature toughening material. In this study, the supported catalysis method was employed to synthesize the MgSiN 2 whisker for the first time, as well as for the impacts of catalyst precursor and heat treatment temperature on the phase, morphology, and growth mechanism of the MgSiN 2 whisker were investigated. The results showed that the precursor of Fe, Co, and Ni catalyst precursors all had catalytic effects on the growth of the MgSiN 2 whisker. The Co catalyst precursor exhibited superior catalytic efficacy, significantly enhancing the yield and length‐to‐diameter ratio of the MgSiN 2 whisker. Furthermore, as the heat treatment temperature increases, the growth mechanism of the MgSiN 2 whisker transitions from vapor–solid (VS) to vapor–liquid–solid (VLS), and ultimately to a dislocation‐mediated growth mechanism. The successful synthesis of the MgSiN 2 whisker, measuring approximately 0.6 µm in diameter and 20–30 µm in length, was achieved at 1400°C. Simultaneously, the Co catalyst precursor had been observed to effectively enhance the adsorption of gaseous Mg and N 2 on the Si 3 N 4 (1 1 0) surface, facilitating the growth of the MgSiN 2 whisker.