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Displaying 44751 - 44775 of 74357

Non-Cavitational Tensile Creep in Lu-Doped Silicon Nitride

January 1, 2002
Author(s)
F Lofaj, Sheldon M. Wiederhorn, Gabrielle G. Long, B Hockey, P R. Jemian, L Browder, April Andreas
The tensile creep behavior of a Lu-based silicon nitride, SN 281, was studied in the temperature range 1400 C to 1550 C with test periods of up to 10 000 h. Strain rates were 3 to 5 orders of magnitude less than those for Yb-based grades of silicon nitride

Nonresonant Control of Multimode Molecular Wave Packets at Room Temperature

January 1, 2002
Author(s)
R A. Bartels, T C. Weinacht, S R. Leone, H C. Kapteyn, M M. Murnane
We demonstrate the creation and measurement of shaped multimode vibrational wave packets in CCl 4 for the first time. Impulsive Raman excitation of wave packets allows coherent control techniques to be applied to molecules without passing through an

On the Mitigation of Early Age Cracking

January 1, 2002
Author(s)
Dale P. Bentz, M R. Geiker, O M. Jensen
Potential means of limiting early age cracking ofconcrete structures have been investigated. Threedifferent methods of mitigating autogenous strainsand stresses in cement mortars (w/s=0.35, 8 % silica fume) are compared: 1.) reduction of thesurface tension
Displaying 44751 - 44775 of 74357
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