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An enhanced strength of Ni matrix composite reinforced by a 3D network structure of TiN nano-particles
Materials & Design ( IF 8.4 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.matdes.2020.108638
Rui Wang , Guoliang Zhu , Wenzhe Zhou , Wei Wang , Donghong Wang , Anping Dong , Da Shu , Baode Sun

Abstract Strengthening is a critical issue for improving the mechanical properties of ceramic particles reinforced metal matrix composites (CPRMMCs). A Ni matrix composite reinforced by TiN nano-particles (TiNNP) with a three-dimensional (3D) network structure was synthesized via low-energy ball-milling (LEBM) and spark plasma sintering (SPS). The ultimate tensile strength (UTS) of the TiN/Ni composite is 690 MPa, an increase of 383% compared to that of the Ni matrix. The 3D network structure of TiN nano-particles formed at the grain boundaries refines the grains significantly and generates a high density of dislocations near the TiN/Ni interface, synergistically contributing to the enhanced strength. Ceramic particles of 3D network structure may be a potential solution to achieving superior properties of CPRMMCs.

中文翻译:

TiN纳米颗粒的3D网络结构增强Ni基复合材料的强度

摘要 强化是提高陶瓷颗粒增强金属基复合材料(CPRMMCs)力学性能的关键问题。通过低能球磨 (LEBM) 和放电等离子烧结 (SPS) 合成了具有三维 (3D) 网络结构的 TiN 纳米颗粒 (TiNNP) 增强的 Ni 基复合材料。TiN/Ni复合材料的极限拉伸强度(UTS)为690 MPa,比Ni基体提高了383%。在晶界处形成的 TiN 纳米颗粒的 3D 网络结构显着细化了晶粒,并在 TiN/Ni 界面附近产生了高密度的位错,协同提高了强度。3D 网络结构的陶瓷颗粒可能是实现 CPRMMC 优异性能的潜在解决方案。
更新日期:2020-06-01
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