scholarly journals Measurement of elastic constants of copper thin films and microstructure evaluation by acoustic-resonance method

2003 ◽  
Vol 2003 (0) ◽  
pp. 439-440
Author(s):  
Nobutomo NAKAMURA ◽  
Yuka KOBAYASHI ◽  
Hirotsugu OGI ◽  
Masahiko HIRAO
Keyword(s):  
Thin Films ◽  
Elastic Constants ◽  
Resonance Method ◽  
Acoustic Resonance ◽  
Microstructure Evaluation

scholarly journals Elastic Constants Determination of the Thin Cold-Rolled Stainless Steel by Acoustic Resonance Method

1996 ◽  
pp. 1423-1429 ◽  
Author(s):  
Seung Seok Lee ◽  
Un-Sig Min ◽  
Bong Young Ahn ◽  
Seung Hyun Yoo
Keyword(s):  
Stainless Steel ◽  
Elastic Constants ◽  
Resonance Method ◽  
Acoustic Resonance ◽  
Cold Rolled

scholarly journals Strain-Dependent Elastic Constants and Magnetic Anisotropy of Co/Pt Superlattice Thin Films

2005 ◽  
Vol 54 (10) ◽  
pp. 1005-1011
Author(s):  
Nobutomo NAKAMURA ◽  
Hirotsugu OGI ◽  
Ryuichi TARUMI ◽  
Takeshi YASUI ◽  
Teruo ONO ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Elastic Constants ◽  
Strain Dependent

Electromagnetic Acoustic Resonance Method for Measuring Stresses in Metal Plates

1994 ◽  
pp. 391-396
Author(s):  
M. Hirao ◽  
H. Ogi ◽  
T. Yamasaki ◽  
H. Fukuoka
Keyword(s):  
Resonance Method ◽  
Acoustic Resonance ◽  
Metal Plates

scholarly journals FEATURES OF QUANTITATIVE MEASUREMENTS OF THE DYNAMIC MODULE OF ELASTICITY OF BINDERS IN OPTIMIZATION OF PRODUCTION TECHNOLOGY SEROGYPSUM COMPOSITE

2021 ◽  
pp. 86-92
Author(s):  
V.I. Tarasevych ◽  
◽  
Yu.G. Gasan ◽  
V.B. Dolgoshey ◽  
◽  
...  
Keyword(s):  
Time Dependence ◽  
Structure Formation ◽  
Elastic Properties ◽  
Physicochemical Characteristic ◽  
Resonance Method ◽  
Acoustic Resonance ◽  
Mechanical Action ◽  
Bending Vibrations ◽  
Damping Decrement ◽  
Kinetics Of

The paper considers the issues of studying the structure formation of binders during hardening to determine the optimal moments of mechanical action on gypsum concrete specimens, which makes it possible to optimize the technology of their impregnation with sulfur melt. The time dependence of the elastic modulus of a hardening, binder is its important physicochemical characteristic, since it is used to objectively identify the stages of structure formation, to simulate the processes occurring at each of the stages. It is noted that the method of acoustic resonance of bending vibrations, in the case of hardening binders, needs correction with respect to the measurement technique and interpretation of the results obtained. The kinetics of the resonance frequency of a sample consisting of a rigid cell and a dispersion poured into it is a function of the elastic properties of the cell, the dispersion itself, the contact zone of the dispersion with cell and therefore cannot be used for either qualitative or quantitative analysis of the kinetics of hardening. Taking into account the elasticity of cuvette is necessary to obtain reliable information. It has been established that in the presence of shrinkage or significant expansion of the binder, the study of structure formation by the resonance method should be carried out in plastic cuvettes. Regardless of shrinkage, the use of a cuvette requires compulsory consideration of its elastic properties. It is advisable to objectively distinguish the stages of structure formation on the basis of the kinetics of not the dynamic modulus of elasticity itself, but the rate of its change. The time dependence of the logarithmic damping decrement is also an important characteristic of the concrete structure. The studies carried out make it possible to obtain serogypsum composites with the necessary performance characteristics and to manufacture elements of architectural décor, wall fencing products of increased aesthetics, durability and reliability from them.

Effect of Stress on the Carrier Contribution to Elastic Constants in Thin Films of Small Gap Compounds

1993 ◽  
Vol 308 ◽  
Author(s):  
Kamakhya P. Ghatak ◽  
Sambhu Nath Biswas
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Experimental Method ◽  
Elastic Constants ◽  
Electron Concentration ◽  
Ultrathin Films ◽  
Theoretical Formulation ◽  
Lattice Matched

ABSTRACTIn this paper we have investigated the carrier contribution to elastic constants in very thin films of stressed small gap compounds within the domain of theory. It is found, taking stressed ultrathin films Hg1-xCdxTe and In1-xGaxAsyP1-y lattice matched to InP as examples, that the elastic constants increase with increasing electron concentration and decreasing film thickness respectively in oscillatory manners. Besides the stress enhances the numerical values of such contribution to the elastic constants. In addition, the theoretical formulation is in agreement with the suggested experimental method of determining such constants in materials having arbitary dispersion laws.

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