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如何计算?
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如何计算? 1. Pores with a radius of 5 mm containing insoluble gases of 1 atm pressure are entrapped within a glass with a relative density of 0.90. what are the equilibrium size of the pores and the final density of the glass? γs is assumed to be 0.5J/m2. 2.Consider an isolated spherical pore with a radius of 3 mm which was entrapped within a Cu powder compact during pressing at 20C. Answer whether the pore expands or shrinks at 1000C. Assume the initial pressure of insoluble gases entrapped within the pore to be 105 N/m2 and the surface energy of Cu at 1000oC to be 1.4 J/m2. |
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nono20092楼
2017-06-07 13:39
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