- freely available
Metals 2016, 6(9), 227; https://doi.org/10.3390/met6090227
2. Experimental Details
2.2. Metallographic Experiment
2.3. Wear Test
3. Results and Discussion
3.1. Microstructure and Phase Composition of B4C/Al 5083 Composite
3.3. Wear Behavior
3.4. Wear Surface
- A B4C/Al 5083 composite with a relatively higher density was fabricated successfully. B4C particles presented a relatively homogeneous distribution in the Al 5083 matrix. No severe particle segregation phenomenon existed in the composite.
- The B13C2, Al3BC and Al4C3 phases were detected from XRD patterns, suggesting B4C particles have reacted with the Al5083 matrix, which enhanced the wettability of the B4C in the matrix.
- The hardness values, friction coefficient and wear resistance of the B4C/Al 5083 composites were higher than those of the Al 5083 matrix. The 30 wt % B4C/Al 5083 composite exhibited the highest wear resistance and friction coefficient.
- At a low applied load of 50 N, the dominant wear mechanisms of the B4C/Al 5083 composites were micro-cutting and abrasive wear. At a high load of 200 N, the dominant wear mechanisms were micro-cutting and adhesion wear. The adhesion wear was associated with the formation of a delamination layer, which protected the composite from further wear and enhanced the wear resistance.
Conflicts of Interest
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