Materials Science And Engineering Properties
Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 4, Problem 42CQ
To determine

The parameter of two molecules that is related to the enthalpy of mixing for a pair of polymer molecules.

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For a steel alloy it has been determined that a carburizing heat treatment of 11.9 h duration will raise the carbon concentration to 0.440 wt% at a point 1.00 mm from the surface. Estimate the time necessary to achieve the same concentration at a 6.40 mm position for an identical steel and at the same carburizing temperature.
Which one has a higher coeffiecient of thermal expansion? High purity fused silica or Pyrex glass (borosilicate)?
A sheet of BCC iron 1 mm thick was exposed to a carburizing gas atmosphere on one side and a decarburizing atmosphere on the other side at 725°C. After having reached steady state, the iron was quickly cooled to room temperature. The carbon concentrations at the two surfaces of the sheet were determined to be 0.012 and 0.0075 wt%. Compute the diffusion coefficient if the diffusion flux is 1.4 × 10-8 kg/m2 -s.
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