Effect of Squeeze Casting Pressure on Interfacial Bonding Properties of ZTA/HCCI Composites

doi:10.3901/JME.260047

Abstract

Abstract: To address the issues of poor interfacial compatibility and inadequate enhancement of materials performance in non-wetting system ZrO₂ toughened Al₂O₃（ZTA） ceramic-reinforced high chromium cast iron（HCCI） composites, liquid forging technology is proposed for establishing reliable bonding between ZTA and HCCI under pressure. The effects of varying liquid forging pressure（0 MPa, 40 MPa, 70 MPa and 100 MPa） on the interfacial bonding state, bonding rate and shear strength are systematically studied. The formation process and bonding mechanism of the ZTA/HCCI interface are discussed. The results indicate that, for the determined ceramic surface morphology（Sa=2.046 μm）, the ceramic-to-metal bonding rate increases from 37.71% to 98.89%, and the bonding strength rises from 16.73 MPa to 24.91 MPa（with an increase of 48.9%） as the preparation pressure increases from 40 MPa to 100 MPa. In addition, when the pressure rises from 40 MPa to 70 MPa and from 70 MPa to 100 MPa, the increase of bonding strength slows down from 30.1% to 14.5%. This indicates that although the increase in pressure can improve the bonding strength, after the pressure reaches a certain value, almost completely interfacial bonding between the ceramic and metal is attained, and the bonding strength basically remains unchanged. The enhancement of interfacial bonding strength can be attributed to the reduction of void size in the interface under pressure, which is also known as the increase in bonding rate. The ZTA/HCCI interface undergoes four phases under pressure:a contact phase, a preliminary bonding phase, a reinforced bonding phase, and an almost complete bonding phase, which achieves a mechanical engagement on the microscopic scale and results in a high bonding strength at the interface. A novel concepts and methodologies for solving the interface bonding problem of non-wetting ceramic/metal composites is proposed, enriches the interfacial control theory of such composites, and establishes a theoretical framework for the industrial application of metal matrix composites.

Key words: liquid die forging, ZrO₂ toughened Al₂O₃/high chromium cast iron, liquid forging pressure, interfacial bond strength

CLC Number:

TB331

QIU Bo, SUN Biao, AO Xiaohui, XING Shuming, WANG Dong. Effect of Squeeze Casting Pressure on Interfacial Bonding Properties of ZTA/HCCI Composites[J]. Journal of Mechanical Engineering, 2026, 62(2): 195-206.

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