Characterization of Solution Annealing Behaviour in Titanium Alloys by Ultrasonic Velocity Measurements

2003 ◽  
Author(s):  
Anish Kumar
Keyword(s):  
Titanium Alloys ◽  
Ultrasonic Velocity ◽  
Solution Annealing ◽  
Velocity Measurements ◽  
Annealing Behaviour

CHARACTERIZATION OF PRECIPITATION BEHAVIOR IN NIMONIC 263 BY ULTRASONIC VELOCITY MEASUREMENTS

2009 ◽  
Author(s):  
G. V. S. Murthy ◽  
Kumar Anish ◽  
G. Sridhar ◽  
T. Jayakumar ◽  
R. N. Ghosh ◽  
...  
Keyword(s):  
Ultrasonic Velocity ◽  
Velocity Measurements ◽  
Precipitation Behavior

Ultrasonic Characterization of Silver Nanoparticles

2005 ◽  
Vol 23 ◽  
pp. 271-274
Author(s):  
S. Rajagopalan ◽  
S.J. Sharma ◽  
V.Y. Nanotkar
Keyword(s):  
Silver Nanoparticles ◽  
Ultrasonic Velocity ◽  
Colloidal Solution ◽  
Adiabatic Compressibility ◽  
Ammonium Bromide ◽  
Velocity Measurements ◽  
Abnormal Behaviour ◽  
Phase Separations ◽  
Ultrasonic Characterization

Nanoparticles exhibit unusual properties in contrast with their bulk properties due to small particle size and quantum confinement. In the present work, ultrasonic velocity and density measurements have been carried out in solutions of silver nanoparticles in micellar dispersion of cetyl tri-metyl ammonium bromide, CTAB. Ultrasonic velocity measurements at different concentrations of surfactant and temperatures were carried out using Sing-Around technique, operated at 2MHz. It is observed that ultrasonic velocity and adiabatic compressibility show abnormal behaviour with increase in concentration of CTAB in the solution, indicating the existence of the phase separations in nano-colloidal solution.

Characterization of the alumina–zirconia ceramic system by ultrasonic velocity measurements

2009 ◽  
Vol 60 (8) ◽  
pp. 875-881 ◽  
Author(s):  
Hector Carreon ◽  
Alberto Ruiz ◽  
Ariosto Medina ◽  
Gerardo Barrera ◽  
Juan Zarate
Keyword(s):  
Ultrasonic Velocity ◽  
Zirconia Ceramic ◽  
Velocity Measurements ◽  
Ceramic System

TEM characterization of reaction zone in a SiC fiber-reinforced titanium alloy

1988 ◽  
Vol 46 ◽  
pp. 738-739
Author(s):  
G. Das ◽  
R. E. Omlor
Keyword(s):  
Titanium Alloys ◽  
Reaction Zone ◽  
Carbon Layer ◽  
Fiber Reinforced ◽  
Reaction Products ◽  
Sic Fibers ◽  
Sic Fiber ◽  
The Matrix ◽  
Immense Potential

Fiber reinforced titanium alloys hold immense potential for applications in the aerospace industry. However, chemical reaction between the fibers and the titanium alloys at fabrication temperatures leads to the formation of brittle reaction products which limits their development. In the present study, coated SiC fibers have been used to evaluate the effects of surface coating on the reaction zone in the SiC/IMI829 system.IMI829 (Ti-5.5A1-3.5Sn-3.0Zr-0.3Mo-1Nb-0.3Si), a near alpha alloy, in the form of PREP powder (-35 mesh), was used a茸 the matrix. CVD grown AVCO SCS-6 SiC fibers were used as discontinuous reinforcements. These fibers of 142μm diameter contained an overlayer with high Si/C ratio on top of an amorphous carbon layer, the thickness of the coating being ∽ 1μm. SCS-6 fibers, broken into ∽ 2mm lengths, were mixed with IMI829 powder (representing < 0.1vol%) and the mixture was consolidated by HIP'ing at 871°C/0. 28GPa/4h.

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