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<p>With the advancement of lunar exploration programs, lunar basalt materials have demonstrated significant potential for aerospace, construction, and other applications due to their high strength, thermal stability and other exceptional properties. However, their unique characteristics and the constraints of extraterrestrial environments pose challenges for efficient fabrication. This study successfully achieved the rapid preparation of bulk lunar basalt materials using the direct current (DC) fast hot-pressed sintering (FHPs) method. The phase composition, microstructure and mechanical properties of the sintered samples were systematically analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), density measurements, Vickers hardness testing and three-point bending tests. The results indicated that the optimal material performance was achieved under sintering conditions of 1000°C (maximum temperature), 40 MPa (applied pressure), and a 10-min holding time. The resulting samples exhibited a density of 3.12 g cm<sup>−3</sup>, a Vickers hardness of 853.7 HV, a fracture toughness of 2.2&#xa0;MPa&#xa0;m<sup>1/2</sup> and bending strength of 85 MPa, demonstrating excellent microstructural integrity and mechanical properties. Another large-sized sample of 210 mm × 110 mm × 10 mm was prepared at 960°C under 30 MPa for 20 min, which provided both theoretical understanding and engineering validation support for the <i>in-situ</i> utilization of lunar basalt in lunar base construction.</p>

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Fabrication of lunar basalt bulk using the DC FHPs method

  • 期刊论文

  • 发表日期：

    2026年6月15日

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  • Jianping Jia,
  • Zirun Yang,
  • Huihui Zhang,
  • Yang Zhang,
  • Kunyou Zhang

摘要

With the advancement of lunar exploration programs, lunar basalt materials have demonstrated significant potential for aerospace, construction, and other applications due to their high strength, thermal stability and other exceptional properties. However, their unique characteristics and the constraints of extraterrestrial environments pose challenges for efficient fabrication. This study successfully achieved the rapid preparation of bulk lunar basalt materials using the direct current (DC) fast hot-pressed sintering (FHPs) method. The phase composition, microstructure and mechanical properties of the sintered samples were systematically analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), density measurements, Vickers hardness testing and three-point bending tests. The results indicated that the optimal material performance was achieved under sintering conditions of 1000°C (maximum temperature), 40 MPa (applied pressure), and a 10-min holding time. The resulting samples exhibited a density of 3.12 g cm−3, a Vickers hardness of 853.7 HV, a fracture toughness of 2.2 MPa m1/2 and bending strength of 85 MPa, demonstrating excellent microstructural integrity and mechanical properties. Another large-sized sample of 210 mm × 110 mm × 10 mm was prepared at 960°C under 30 MPa for 20 min, which provided both theoretical understanding and engineering validation support for the in-situ utilization of lunar basalt in lunar base construction.