Green Preparation and Dry Sliding Wear Properties of a Macro-ZTA/Fe Composite Produced by a Two-Step Method

Abstract

In this paper, a two-step method, rapid-flow mixing followed by high-pressure compositing was used to prepare a macro-ZTA (ZrO2-toughened Al2O3) particles reinforced high chromium cast iron (HCCI) matrix composite. The method is based on the squeeze casting process without general casting pollution problems. The microstructure, mechanical properties and dry sliding wear performance of the fabricated composite were investigated. The results showed that the particles were distributed uniformly throughout the iron matrix and a tightly bonded interface was obtained. Under dry sliding wear conditions, the wear resistance of the composite was significantly improved in comparison with the HCCI alloy, and the relative wear resistance was 1.8 and 2.9 times at the applied load of 300 and 900 N, respectively. When the load increased from 300 N to 900 N, the wear characteristics of the composite changed from shallow and narrow grooves and scratches to damages in the form of fragmentation of particles, transfer layer and interface cracking.

Interfacial bonding and abrasive wear behaviours of the iron matrix composites

“…The new sands were replaced after each test duration to eliminate the 'size effect' of the abrasive sand. The mass changes before and after test were used for evaluating the wear resistance of the samples [9,11,18,[21][22][23][32][33][34]. The mass loss was the average value of three group experimental data to guarantee reproducibility.…”

“…On the other hand, the favourable fabrication technique can also improve the wear resistance of composites [33,34]. Qiu et al [33] found that the relative wear resistance of the ZTA reinforced Cr26-based composites prepared by pressure casting was higher than that of the composites prepared by infiltration casting due to their tight interfacial bonding.…”

“…On the other hand, the favourable fabrication technique can also improve the wear resistance of composites [33,34]. Qiu et al [33] found that the relative wear resistance of the ZTA reinforced Cr26-based composites prepared by pressure casting was higher than that of the composites prepared by infiltration casting due to their tight interfacial bonding. Zhou et al [34] reported that the three-body wear resistance of the ZTA reinforced Cr26-based composites assisted by a continuous and compact transition layer was higher than that of the Cr26 standard samples and the bare ZTA reinforced Cr26-based composites.…”

Tribological Properties of 2D Materials and Composites—A Review of Recent Advances

“… The worn surface morphology of ZrO 2 -toughened Al 2 O 3 particles reinforced high-chromium cast iron (HCCI) matrix composite at different loads: ( a ) 300 N-low magnification; ( b ) 300 N-high magnification; ( c ) 900 N-low magnification; and ( d ) 300 N-high magnification [ 32 ]. …”

Microstructure and High-Temperature Wear Performance of FeCr Matrix Self-Lubricating Composites from Room Temperature to 800 °C

“…It is therefore necessary to develop composites with a low cost, a low friction coefficient, and a high wear resistance at elevated temperatures. Fe matrix material is one of the superalloys, which are widely used in many industrial fields as wear resistant mechanical parts [4,5]. High-temperature Fe matrix sleeves and bears always run at 600 • C. However, wear resistance depends on the mechanical properties of materials at elevated temperatures [6,7], resulting in severe wear.…”