Dislocation Behavior in ZrC Particles during Elevated Temperature Compressive Deformation of a 30 vol.% ZrC_p/W Composite

Taiquan Zhang1,2),Qingchang Meng1),Yujin Wang1),Yu Zhou1) and Guiming Song1,3) 1) Institute for Advanced Ceramics,Harbin Institute of Technology,Harbin 150001,China 2) China National R&D Center for Tungsten Technology,Xiamen 361009,China 3) Department of Materials Science and Engineering,Delft University of Technology,Mekelweg 2,2628CD Delft,the Netherlands

摘 要：A 30 vol.% ZrCp/W composite has been deformed in compression in the temperature range of 1200-1600℃.Dislocation nucleation mechanism in ZrC particles is discussed by analyzing the harmonious deformation between tungsten-matrix and ZrC particles.Thermal activation apparently increases the mobility of screw segments,resulting in the formation of many kinetics jogs and thermodynamics jogs above 1300℃.The formation mechanisms of the dislocation configurations are studied.

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