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<p>This research investigates the effect of interfacial wetting agents on the impact-abrasive wear behavior of zirconia-toughened alumina particle (ZTA<sub>P</sub>)-reinforced high chromium cast iron (HCCI) composites. To improve the interfacial bonding between ZTA<sub>P</sub> and the HCCI matrix, ZTA<sub>P</sub> surfaces were coated with Fe (100% Fe), Ti15 (85% Fe + 15% Ti), and Cr60 (40% Fe + 60% Cr) wetting agents, respectively, after which three ZTA<sub>P</sub>/HCCI composites were fabricated via lost foam casting. Results show that Fe, Ti15, and Cr60 significantly affect the hardness distribution, stress coordination, and wear resistance of the composites by regulating the austenite transformation of the matrix and the formation of interfacial phases. All three wetting agents form continuous 5-15&#xa0;μm-thick interface layers, but their phase compositions differ: Fe creates an interface with a tough phase MnAl<sub>6</sub>; Ti15 forms one with brittle carbides TiC; and Cr60 yields brittle glassy phases SiO<sub>2</sub>, NaAlSiO<sub>4</sub> and NaAlO<sub>2</sub>. Fe(ZTA<sub>P</sub>)/HCCI exhibits the lowest wear loss (only 38-45% of that of HCCI, and even 44.3% under an impact energy of 3&#xa0;J) and maintains good wear resistance even at an impact energy of 3&#xa0;J, which is attributed to its impact toughness. Its interface absorbs impact energy through plastic deformation, coordinates stress transfer, inhibits crack initiation, and ensures strong bonding between particles and the matrix. In contrast, Ti15(ZTA<sub>P</sub>)/HCCI fractures at an impact energy of 3&#xa0;J due to crack initiation at the brittle carbide interface, while Cr60(ZTA<sub>P</sub>)/HCCI fractures at an impact energy of 2&#xa0;J because the brittle glassy phase interface undergoes cracking and spalling, accelerating the detachment of ZTA<sub>P</sub>.</p>

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Effect of Interface Wetting Agents on Impact-Abrasive Wear Properties of Zirconia-Toughened Alumina Particle-Reinforced High Chromium Cast Iron Matrix Composite

  • 期刊论文

  • 发表日期：

    2025年11月20日

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  • Jinrong Chai

摘要

This research investigates the effect of interfacial wetting agents on the impact-abrasive wear behavior of zirconia-toughened alumina particle (ZTAP)-reinforced high chromium cast iron (HCCI) composites. To improve the interfacial bonding between ZTAP and the HCCI matrix, ZTAP surfaces were coated with Fe (100% Fe), Ti15 (85% Fe + 15% Ti), and Cr60 (40% Fe + 60% Cr) wetting agents, respectively, after which three ZTAP/HCCI composites were fabricated via lost foam casting. Results show that Fe, Ti15, and Cr60 significantly affect the hardness distribution, stress coordination, and wear resistance of the composites by regulating the austenite transformation of the matrix and the formation of interfacial phases. All three wetting agents form continuous 5-15 μm-thick interface layers, but their phase compositions differ: Fe creates an interface with a tough phase MnAl6; Ti15 forms one with brittle carbides TiC; and Cr60 yields brittle glassy phases SiO2, NaAlSiO4 and NaAlO2. Fe(ZTAP)/HCCI exhibits the lowest wear loss (only 38-45% of that of HCCI, and even 44.3% under an impact energy of 3 J) and maintains good wear resistance even at an impact energy of 3 J, which is attributed to its impact toughness. Its interface absorbs impact energy through plastic deformation, coordinates stress transfer, inhibits crack initiation, and ensures strong bonding between particles and the matrix. In contrast, Ti15(ZTAP)/HCCI fractures at an impact energy of 3 J due to crack initiation at the brittle carbide interface, while Cr60(ZTAP)/HCCI fractures at an impact energy of 2 J because the brittle glassy phase interface undergoes cracking and spalling, accelerating the detachment of ZTAP.