Results 251 to 260 of about 3,031,297 (290)

Local stability of nonequilibrium phases

Physical Review Letters, 1994
The relative structural stability of the transition metals and their alloys for a tetragonal deformation is investigated. Total energy calculations demonstrate that the nonequilibrium cubic structures are [ital locally] [ital unstable] with respect to this deformation mode at low temperatures, i.e., the cubic elastic constants ([ital c][sub 11][minus ...
, Craievich, , Weinert, , Sanchez, , Watson   +3 more
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Phase Stability in Nanocrystalline Zirconia

Solid State Phenomena, 2005
Zirconia can be considered to be one of the most important ceramic materials because of its large range of industrial applications (catalysis, coatings, spacecraft shielding, paint additives, oxygen sensors, fuel cells, nuclear fuel matrices, an alternative high permittivity material to replace silicon oxide as a gate dielectric in MOS devices).
Baldinozzi, G., Simeone, D., Gosset, D., Dutheil, M.   +3 more
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Phase stability of scandia–yttria-stabilized zirconia TBCs

Surface and Coatings Technology, 1998
Abstract The evolution in phase composition resulting from 1400°C ageing of ZrO 2 samples stabilized by ∼4–7 mol.% each of Y 2 O 3 (YSZ), Sc 2 O 3 (ScSZ), or a mixture of Sc 2 O 3 –Y 2 O 3 (SYSZ) was studied by synchrotron radiation X-ray diffraction (SR XRD) using whole powder pattern fitting (WPPF), a recently proposed Rietveld-based method for
Leoni, Matteo, R. L. Jones, Scardi, Paolo   +2 more
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Phase Stability and Phase Transitions

2014
To get a clear idea of the phase state of matter it is necessary to understand the concept of phase. The term ‘phase’ can be defined structurally and thermodynamically. It is part of a system separated from other parts by interfaces and differing from them in thermodynamic properties.
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Phase Self-Stabilization

1978
If x = x0(t) is the solution of the system of equations with the initial condition x0 (t0) = a, then the condition x0 (t + γ) = a evidently corresponds to the solution x = x0(t + γ). The set of motions of an autonomous dynamic system permits arbitrary shifts in time.
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Phase Stabilized Vernier Chronotron

Review of Scientific Instruments, 1966
A 500 channel system is described for measuring time intervals up to 1 μsec in 2 nsec increments. The vernier chronotron method of Lefevre and Russell is modified by the addition of a stable time base which phase-locks the circulation period of each loop and thus stabilizes the channel width. Solid state circuit elements are used throughout.
P. J. Kindlmann, J. Sunderland
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QUARTZ CRYSTAL PHASE-STABILITY MEASURING EQUIPMENT (R-F PHASE STABILITY ANALYZER)

1961
Abstract : Equipment was developed to measure the phase stability of quartz crystal units in the frequency range from 1 to 110 mc while being subjected to 10 g vibration from 20 cps to 2000 cps. Details of development problems, explanation of circuit operation, and circuit analysis are presented for the tunable phase detector, reference oscillator ...
J. C. SCHMITT, M. E. FRERKING, H. P. BROWER   +2 more
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SrO: Phase Transition Pressure, Phase Stability, Phase Diagram

2017
SrO. B1-B2 phase diagram from PP-PW-LDA calculations in the quasiharmonic approximation [12S]
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Phase Stability in Nanostructures

Advanced Engineering Materials, 2001
Nanostructured materials provide access to tailor-made materials properties by microstructural design. Excellent mechanical properties such as high strength or wear resistance are often found in nanocrystalline materials. For magnetic materials, the design of nanostructured composites offers advantages if the structural scales match the intrinsic ...
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Phase Stability Under Irradiation

2016
Irradiation can have profound effects on the formation or dissolution of phases by alteration of the stability of those phases. The most direct way in which irradiation can alter phase stability is by causing local enrichment or depletion of solute such that the solubility limit is crossed.
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