Internal Friction and Elastic Constants of Palladium—Boron—Hydrogen Alloys*

1985 ◽  
Vol 145 (1_2) ◽  
pp. 221-228 ◽  
Author(s):  
H. Brodowsky ◽  
J. Fleischhauer
Keyword(s):  
Internal Friction ◽  
Elastic Constants

scholarly journals Ultrasonic Characterization of Nanoparticle-Based Ceramics Fabricated by Spark-Plasma Sintering

Ceramics ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 135-147
Author(s):  
Hanuš Seiner ◽  
Michaela Janovská ◽  
Martin Koller ◽  
Petr Sedlák ◽  
Kateřina Seinerová ◽  
...  
Keyword(s):  
Activation Energy ◽  
Boron Nitride ◽  
Internal Friction ◽  
Elastic Constants ◽  
Carbon Nitride ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Friction Parameters ◽  
Boron Carbon Nitride ◽  
Boron Carbon

Resonant ultrasound spectroscopy was used to determine elastic constants and internal friction parameters of bulk nanoparticle-based ceramic materials compacted by spark plasma sintering. Boron nitride-based and boron carbon nitride-based materials were studied, and the results were compared with similar bulk materials prepared from graphene nanoplatelets. The results showed that such nanoparticle-based materials can be strongly anisotropic, and can have very different elastic constants depending on the nanoparticles used. From the temperature dependence of the internal friction parameters, the activation energy for sliding of the individual monolayers along each other was determined for each material. Very similar values of the activation energy were obtained for boron nitride, boron carbon nitride, and graphene, ranging from 15 to 17 kJ/mol.

scholarly journals Elastic constants, internal friction, and piezoelectric coefficient ofα−TeO2

2004 ◽  
Vol 69 (2) ◽  
Author(s):  
Hirotsugu Ogi ◽  
Masashi Fukunaga ◽  
Masahiko Hirao ◽  
Hassel Ledbetter
Keyword(s):  
Internal Friction ◽  
Elastic Constants ◽  
Piezoelectric Coefficient
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