Mechanical Behavior of TiB2 Nanoparticles Reinforced Cu Matrix Composites Synthesized by In-Situ Processing

Dae Hwan Kwon; Khoa Xuan Huynh; Thuy Dang Nguyen; Pyuck Pa Choi; Myung-Gyu Chang; Young Jin Yum; Ji Soon Kim; Young Soon Kwon

doi:10.4028/www.scientific.net/MSF.510-511.346

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High Temperature Deformation Behavior of Pre-Sintered Al-10Si-5Fe Based Alloy
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Mechanical Behavior of TiB₂ Nanoparticles Reinforced Cu Matrix Composites Synthesized by In-Situ Processing
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Microstructures and Tensile Properties of Fe-40Al Intermetallic with High Boron Content
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HomeMaterials Science ForumMaterials Science Forum Vols. 510-511Mechanical Behavior of TiB2 Nanoparticles...

Mechanical Behavior of TiB₂ Nanoparticles Reinforced Cu Matrix Composites Synthesized by In-Situ Processing

Abstract:

Cu-TiB2 nanocomposite powders were in situ synthesized by combining high-energy ball milling of Cu-Ti-B elemental powder mixtures as precursors and subsequent self-propagating high temperature synthesis (SHS). Cu-40wt.% TiB2 was produced after SHS reaction and then diluted by copper to obtain desired homogeneous composites with 2.5, 5 and 10wt.%TiB2. Spark plasma sintering (SPS) was used to inhibit grain growth and thereby obtain fully Cu-TiB2 sintered bodies with nanocomposite structure. After SHS reaction, only Cu and TiB2 phases were detected in the SHS-product. Spheroidal TiB2 particles smaller than 250nm were formed in the copper matrix after SHS-reaction. Mechanical and electrical properties were investigated after SPS at 650°C for 30min under 50MPa. The electrical conductivity decreased from 75 to 54% IACS with increasing of TiB2 contents from 2.5 to 10wt.%. However, hardness increased from 56 to 97HRB. In addition, the tensile strength increased with increasing the TiB2 content.