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<p>The 2D C<sub>f</sub>/ZrC-ZrB<sub>2</sub> composites are fabricated using the reactive metal infiltration (RMI) process. Zirconium metal chips with a melting temperature of 1850&#xa0;°C were infiltrated into porous C<sub>f</sub>/C-B<sub>4</sub>C preform by capillary action at a temperature of 2000&#xa0;°C to obtain C<sub>f</sub>/ZrC-ZrB<sub>2</sub> composites. Flexural strength of composite specimen was determined in in-plane and out-of-plane directions using three-point bend test fixture on UTM (Instron 5967) as per ASTM C1341 standards. The C<sub>f</sub>/ZrC-ZrB<sub>2</sub> composite show flexural strength of 86.94&#xa0;MPa in in-plane direction and 83&#xa0;MPa in out-of-plane direction. Fracture toughness was determined using specimen with mid-span notch on same fixture as used for flexural test and applying the load in direction of the notch. Fracture toughness of 2.24&#xa0;MPa <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\sqrt m\)</EquationSource> <EquationSource Format="MATHML"><math> <msqrt> <mi>m</mi> </msqrt> </math></EquationSource> </InlineEquation> is achieved in-plane direction and 2.49&#xa0;MPa <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\sqrt m\)</EquationSource> <EquationSource Format="MATHML"><math> <msqrt> <mi>m</mi> </msqrt> </math></EquationSource> </InlineEquation> in out-of-plane direction. Evidence of crack propagation was captured in SEM images. All the phases present in the composite are confirmed by x-ray diffraction, and all elements are detected in energy-dispersive spectrum mapping.</p>

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Investigation of Mechanical Properties of 2D Cf/ZrC-ZrB2 Composites Fabricated through Reactive Metal Infiltration Process

  • 期刊论文

  • 发表日期：

    2026年7月17日

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  • Satyendra Kumar,
  • Shailendra Sinha,
  • Anand Kumar

摘要

The 2D Cf/ZrC-ZrB2 composites are fabricated using the reactive metal infiltration (RMI) process. Zirconium metal chips with a melting temperature of 1850 °C were infiltrated into porous Cf/C-B4C preform by capillary action at a temperature of 2000 °C to obtain Cf/ZrC-ZrB2 composites. Flexural strength of composite specimen was determined in in-plane and out-of-plane directions using three-point bend test fixture on UTM (Instron 5967) as per ASTM C1341 standards. The Cf/ZrC-ZrB2 composite show flexural strength of 86.94 MPa in in-plane direction and 83 MPa in out-of-plane direction. Fracture toughness was determined using specimen with mid-span notch on same fixture as used for flexural test and applying the load in direction of the notch. Fracture toughness of 2.24 MPa \(\sqrt m\) m is achieved in-plane direction and 2.49 MPa \(\sqrt m\) m in out-of-plane direction. Evidence of crack propagation was captured in SEM images. All the phases present in the composite are confirmed by x-ray diffraction, and all elements are detected in energy-dispersive spectrum mapping.