Ultra-fast synthesis and composition-dependent formation behavior of(Hf_(x)Zr_(1−x))B_(2)solid solution nanopowdersOA
Ultrafine boride solid solutions offer immense potential for extreme environmental applications,yet their rapid synthesis with nanoscale compositional control remains a challenge.Herein,we exploit ultrafast high-temperature sintering to achieve the rapid synthesis of a(Hf_(x)Zr_(1−x))B_(2)solid solution with exceptional nanoscale homogeneity.The phase composition and evolution during solid solution formation,as well as the formation tendency with varying Hf/Zr molar ratios,were systematically investigated.First-principles calculations reveal a progressively enhanced tendency to form a single-phase solid solution with increasing Hf content,which is attributed to the lower solution energy(Esol)for Zr atoms incorporating into the HfB_(2)lattice compared with the reverse process.This finding is consistent with the result of a lower synthesis temperature for(Hf_(0.8)Zr_(0.2))B_(2)(1700℃).In addition,(Hf_(0.8)Zr_(0.2))B_(2)also exhibits superior phase and thermodynamic stability,as demonstrated by its more negativeΔGmix,lower DOS value at Ef,and reduced average bond length.This work not only establishes an efficient pathway for powder synthesis but also delivers foundational insights for the rational design of multidiboride ceramics.
Sen Yang;Zhengang Zhang;Yanqin Fu;Tao Li;Liyuan Han;Lingxiang Guo;Hang Yu;Jianhua Zhang;Wei Xie;Hailong Wang;Yulei Zhang
Henan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,China School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,ChinaShaanxi Key Laboratory of Fiber Reinforced Light Composite Materials,Northwestern Polytechnical University,Xi’an 710072,ChinaShaanxi Key Laboratory of Fiber Reinforced Light Composite Materials,Northwestern Polytechnical University,Xi’an 710072,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,ChinaSchool of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,ChinaSchool of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,China Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials,Northwestern Polytechnical University,Xi’an 710072,China
化学化工
ultrafineultrafast high-temperature sinteringsolid solutionformation tendency
《Journal of Advanced Ceramics》 2026 (5)
P.107-115,9
supported by the National Natural Science Foundation of China(Grant Nos.52402113 and 52302091)the Joint Fund of Henan Province Science and Technology R&D Program(Grant Nos.235200810072,235200810094,and 245200810094)Henan Province Major Basic Research Program(Grant No.252310420100)the Scientific and Technological Research Project of Henan Academy of Sciences(Grant No.20252321002).
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