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Science 22 November 1968:
Vol. 162. no. 3856, pp. 902 - 903
DOI: 10.1126/science.162.3856.902
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Articles

Stress Gradient in Solid Methane at High Pressures

R. E. Stajdohar 1, P. F. Hettwer 2, and D. R. McCann 2

1 McGraw-Edison Power Systems Division, Research and Development Department, P. O. Box 160, South Milwaukee, Wisconsin 53712
2 Allis-Chalmers Manufacturing Company, Research Division, Milwaukee, Wisconsin 53201

The magnitude of the axial pressure gradient at 77°K (11 percent per centimeter) in solid methane compressed along one axis for applied pressures up to 10 kilobars was determined by comparing the electrical resistance of a pair of doped tellurium pressure gages with that of a set of single-crystal gages made of high-purity bismuth. The existence of the pressure gradient revealed the causes of deformation in metal tensile specimens embedded in solid methane and cycled to high pressure.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)