碳氮化铪锆(Hf,Zr)(C,N)的一步机械诱导自维持反应:粉末合成和放电等离子体烧结

IF 2.7 Q1 MATERIALS SCIENCE, CERAMICS
Irina Khadyrova, V. Suvorova, A. Nepapushev, D. Suvorov, K. Kuskov, D. Moskovskikh
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引用次数: 0

摘要

采用简单、快速的机械化学合成方法合成了纳米结构单相碳氮化铪锆粉体。临界碾磨时间为10 min,通过机械诱导自持续反应(MSR)在瓶内形成(Hf,Zr)(C,N)固溶体。经过30 min的处理,完成固气反应,得到10 - 500 nm亚微米颗粒的均匀(Hf,Zr)(C,N)粉末。不同处理时间后粉末的物相和结构演变可以建立可能的反应机制,包括Hf/Zr/ c层状复合颗粒的形成,它们通过MSR相互作用,进一步研磨和氮化。采用火花等离子烧结(SPS)技术,以纳米结构粉末为原料制备了块状碳氮化铪锆陶瓷。该样品具有较高的相对密度、硬度和断裂韧性值,高于类似成分的二元化合物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hafnium-Zirconium Carbonitride (Hf,Zr)(C,N) by One Step Mechanically Induced Self-Sustaining Reaction: Powder Synthesis and Spark Plasma Sintering
Nanostructured single-phase hafnium-zirconium carbonitride powders were synthesized using a simple and fast mechanochemical synthesis approach. The critical milling duration, after which a (Hf,Zr)(C,N) solid solution formation inside a jar occurred via mechanically induced self-sustained reaction (MSR), was 10 min. After 30 min of treatment, a solid-gas reaction was completed, and as a result, a homogeneous (Hf,Zr)(C,N) powder consisting of 10–500 nm submicron particles was obtained. The phase and structure evolution of the powders after different treatment durations allowed for the establishment of possible reaction mechanisms, which included the formation of Hf/Zr/C-layered composite particles, their interaction via MSR, and further grinding and nitridization. Spark plasma sintering (SPS) was used to produce bulk hafnium-zirconium carbonitride ceramics from nanostructured powder. The sample had higher values of relative density, hardness, and fracture toughness than those for binary compounds of a similar composition.
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来源期刊
CiteScore
3.00
自引率
7.10%
发文量
66
审稿时长
10 weeks
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