A self-lubricating composite consists of a physical mixture of bronze and graphi

Question

A self-lubricating composite consists of a physical mixture of bronze and graphite. The composite is porous and is shaped as a rectangular bar measuring 4.5 mm by 13.5 mm x 33.5 mm. The mass of the bar before and after soaking in water is 11.5 and 11.7035 g, respectively. Assume that water occupies 100% of the pore volume after soaking. A volume balance for the bar is: VB + VG + VP = VT A mass balance for the fully-dry bar is: PBVB + PGVG = 11.5 grams Calculate the volume percentage porosity. Calculate the volume percentages of bronze and graphite. Calculate the weight percentages of bronze and graphite.

Explanation / Answer

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