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田智豪,彭英彪,颜练武,龙坚战,周书助,汤郡.基于热、动力学计算模拟研发梯度硬质合金[J].稀有金属材料与工程(英文),2021,50(1):229~234.[Tian Zhihao,Peng Yingbiao,Yan Lianwu,Long Jianzhan,Zhou Shuzhu and Tang Jun.Integrated Computational Materials Engineering(ICME) for developing the graded cemented carbides[J].Rare Metal Materials and Engineering,2021,50(1):229~234.]
Integrated Computational Materials Engineering(ICME) for developing the graded cemented carbides
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Received:February 12, 2020  
DOI:
Key words: CALPHAD  Cemented carbides  gradient sintering  microstructure
Foundation item:国家自然科学(项目号51601061);湖南省科技厅项目(2018JJ2094)
Author NameAffiliation
Tian Zhihao,Peng Yingbiao,Yan Lianwu,Long Jianzhan,Zhou Shuzhu and Tang Jun  
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Abstract:
      Abstract: It is a powerful and efficient method for materials development and process optimization by gasping the thermodynamic and kinetic information of studied materials and further performing simulations. The quality of CALPHAD-type calculations is strongly dependent on the quality of the thermodynamic and diffusivity databases. Based on previously developed thermodynamic database (CSUTDCC1) and diffusivity database (CSUDDCC1), some simulations concerned during the research and development of cemented carbides, like sintering “carbon window” and cubic phase composition, were performed. Several gradient cemented carbides sintered under vacuum and various partial pressures of N2 have been studied. The microstructure and element concentration in the gradient layer were investigated via SEM and EPMA. Thermodynamic and kinetic simulations were performed and agreed well with experimental data. Examples of thermodynamic and kinetic simulation applications in design and manufacture for gradient cemented carbides were shown, which provides theoretical basis for the development of novel and high-performance gradient cemented carbides.