Synthesis of novel single-phase high-entropy metal carbonitride ceramic powders. (January 2021)

• Record Type: Journal Article
• Authors: Ma, Shiqing; Ma, Junqing; Yang, Zhigang; Gong, Yubo; Li, Kaili; Yu, Gang; Xue, Zhengwei
• Is Part Of: International journal of refractory metals & hard materials. Volume 94(2021)
• Publication Date: 2021-01
• Subjects: Synthesis -- High-entropy carbonitride -- Carbothermal reduction -- Solid solution; Heat resistant alloys -- Periodicals; Refractory materials -- Periodicals; Metallography -- Periodicals; Alliages réfractaires -- Périodiques; Matériaux réfractaires -- Périodiques; Métallographie -- Périodiques; Heat resistant alloys; Metallography; Refractory materials; Periodicals; Electronic journals; 669.73
• DOI: 10.1016/j.ijrmhm.2020.105390
• Languages: English
• ISSNs: 0263-4368

Abstract

Abstract: Single-phase high-entropy metal carbonitride (HECN) powders, namely (HfZrTaNbTi)(C, N), were successfully synthesized via a facile high-energy ball milling assisted carbothermal reduction nitridation at the temperature above 1400 °C in a flowing N2 atmosphere for the first time. The as-prepared HECN powders had a single-crystalline structure of metal carbonitride and simultaneously possessed high compositional uniformity. The increasing temperature from 1400 °C to 1600 °C promoted the grain growth of HECN powders from 0.31 μm to 1.26 μm. The low oxygen content of 0.494 wt% was obtained for as-prepared HECN powders at 1600 °C. This work is the first report of preparing a high-entropy metal carbonitride powders using metal oxides and carbon as raw materials. Highlights: Single-phase high-entropy metal carbonitride (HECN) powders were successfully synthesized. The as-prepared HECN powders had a single-crystalline structure of metal carbonitride and simultaneously possessed high compositional uniformity. The increasing temperature promoted the grain growth of HECN powders.