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<p>The W-Ti gradient composite was used as a wave-impedance-gradient flyer to achieve quasi-isentropic loading in gas-gun experiments. However, the static mechanical behavior of this composite is insufficiently understood. In this study, a six-layer W-Ti gradient composite was fabricated by integrating the tape-casting method with hot-pressing sintering. The results demonstrated that W and Ti particles in the gradient composite can achieve excellent metallurgical bonding. Notably, the bending strength of the gradient composite is superior to that of homogeneous composites and exhibits significant loading direction dependence: under loading applied from the W side (451.1&#xa0;MPa), the bending strength is 75.9% higher than that under loading applied from the Ti side (256.4&#xa0;MPa). Conversely, the bending strength from the Ti end is significantly reduced, accounting for only 56.8% of that from the W end. This study provides new insights into the microstructure regulation and performance optimization of W-Ti gradient composites.</p>

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Microstructure and Mechanical Properties of W-Ti Gradient Composite Fabricated by Tape-Casting and Hot-Pressed Sintering

  • 期刊论文

  • 发表日期：

    2025年12月4日

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  • Chaowei Hou,
  • Di Ouyang,
  • Youfa Wang,
  • Ruizhi Zhang,
  • Qinqin Wei,
  • Jian Zhang,
  • Guoqiang Luo

摘要

The W-Ti gradient composite was used as a wave-impedance-gradient flyer to achieve quasi-isentropic loading in gas-gun experiments. However, the static mechanical behavior of this composite is insufficiently understood. In this study, a six-layer W-Ti gradient composite was fabricated by integrating the tape-casting method with hot-pressing sintering. The results demonstrated that W and Ti particles in the gradient composite can achieve excellent metallurgical bonding. Notably, the bending strength of the gradient composite is superior to that of homogeneous composites and exhibits significant loading direction dependence: under loading applied from the W side (451.1 MPa), the bending strength is 75.9% higher than that under loading applied from the Ti side (256.4 MPa). Conversely, the bending strength from the Ti end is significantly reduced, accounting for only 56.8% of that from the W end. This study provides new insights into the microstructure regulation and performance optimization of W-Ti gradient composites.