The Effect of Reinforcement Ratio on the Wear Behaviour of AlB₂Flake Reinforced Metal Matrix Composites

Abstract

Aluminiumboride composites (AlAlB2) having two dierent volume fractions of reinforcing (AlB2), namely 4.0 and 10.0 per cent have been produced through synthesizing boron by reaction of boron oxide (B2O3) with liquid aluminium. Friction and wear characteristic of the composites have been investigated under dry sliding condition and results compared with pure aluminium. The wear rate increases with normal load and sliding speed and is signicantly lower with the composites when compared to that of monolithic material. The coecient of friction increased with increasing volume fraction of AlB2 reinforcement phase. The wear rate, however, decreased with increasing volume fraction of AlB2.

Mechanical properties and tribological behavior of aluminum matrix composites reinforced with in-situ AlB2 particles

“…In addition, the plasma generated between particles contributes to the elimination of surface impurities, leading to enhanced sintering and consolidation [19]. Unlike the many studies which have been done of the mechanical properties and structural characterization of B4C reinforced AMCs [14][15][16][17][18][20][21][22][23][24][25][26][27], little research has been done to examine the wear properties of AlB2 particle reinforced AMCs [28][29][30][31]. Actually, AlB2 particles are effective nucleation sites for aluminum alloys and the chemical reactivity between particles and melt is minimized, leading to excellent interfacial bonding with the matrix [32].…”

Effect of Cryolite on Microstructure of Insitu AlB2 Aluminium Metal Matrix Composites

“…AMC with ultra-fined ceramic material or particles have been extensively used in aerospace and automotive application [11][12][13]. In the recent years more attention is paid to insitu composites mainly because of its clean interface formed in between the base matrix with reinforcement, good bonding strength, high interfacial integrity, clear uniform distribution in the matrix with high mechanical properties and low fabrication costs [14][15][16][17][18][19]. Owing to its uniform distribution in the matrix, the insitu AMC are widely used in the structural application, when high stiffness, more strength to weight ratio plays an important role in the aerospace and automotive industries [20][21][22].…”

Corrosion Behavior of in-Situ AlB2/Al-Cu Metal Matrix Composite

“…AlB 2 boride particles generally appear as the thin hexagonal flakes within the matrix. The width of flakes was determined to be in the range of 10 and 2000 µm, and thickness between 0.3 and 6 µm, depending on the type and the parameters of the synthesis process and on alloying elements [5][6].…”