Ductile particle

Dual cure sites Ductile iron Ductile particles Duct silencers Dugro [7681-76-7]... 

The thermal shock behaviour of hot-pressed alumina, hot-pressed and sintered alumina reinforced with iron particles (reprinted from Journal of the European Ceramic Society, 19, Aldridge and Yeomans, The thermal shock behaviour of ductile particle toughened alumina composites, 1769-1775, copyright 1999, with permission from Elsevier). 

V. D. Krstic, On the Fracture of Brittle-Matrix/Ductile-Particle Composites, Phil Mag. A48, 695-708 (1983). 

The constraint is removed by some debonding, allowing for the necking of the ductile particles. The bridging force variations in these two cases are shown in Figs. 8.66b (very high interfacial bond) and 8.67b (particle necking). Mathematical... 

Fig. 7.23. Hampering crax k propagation by ductile particles (after [149])...

When a mixture of brittle and ductile materials is miUed, both of the above-mentioned processes take place (Figure 2.2d). Plastic deformation of the ductile material absorbs the impact energy, resulting in much less fracture of the brittle material. Under the impact, the brittle particles can either penetrate into or sandwiched between two flattened ductile particles. Hence, repeated impacts lead to the dispersion of the brittle material within the ductile matrix. Metal matrix composites (MMC) could be synthesized in this way [8]. 

The similar modulus of the two phases creates a uniform stress distribution across the boundaries. As a result, fracture is not likely to initiate near the boundaries, but within the matrix. The propagation of cracks will be hampered by plastic deformations or microcavitations in the dispersed ductile particles. 

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