Effect of Elevated Temperature on Tribological Properties of Steel, Silicon Nitride and Zirconia Against Steel

2018 ◽  
Vol 10 (3) ◽  
pp. 434-439
Author(s):  
Yadvendra Kaushik ◽  
P. Ramkumar
Keyword(s):  
Elevated Temperature ◽  
Silicon Nitride ◽  
Tribological Properties

Phase Relationship Studies of Silicon Nitride System—A Key to Materials Design

1992 ◽  
Vol 287 ◽  
Author(s):  
T.S. Yen ◽  
W.Y. Sun
Keyword(s):  
Elevated Temperature ◽  
Silicon Nitride ◽  
Grain Boundary ◽  
Phase Behavior ◽  
Phase Diagrams ◽  
Room Temperature ◽  
Phase Relationship ◽  
Materials Design ◽  
Basic Approach ◽  
System A

ABSTRACTAdditions and revisions to several of the most important phase diagrams and phase behavior diagrams in the silicon nitride field are reviewed in this work, with emphasis on the Y-Si-A1-O-N system. This information is further used to make observations on the promising silicon nitride systems containing either highly refractory grain boundary phases or compatible matrix phases of desirable properties. Examples are provided to illustrate the advantage of such a basic approach to materials design. Hardness, toughness, strength at room temperature and elevated temperature and even sinterability can all be improved by adopting such an approach.

scholarly journals Experiment on Foreign Object Damage of Gas Turbine-Grade Silicon Nitride Ceramic

1998 ◽  
Author(s):  
Hiro Yoshida ◽  
Takashi Nakashima ◽  
Makoto Yoshida ◽  
Yasushi Hara ◽  
Toru Shimamori
Keyword(s):  
Elevated Temperature ◽  
Silicon Nitride ◽  
Elevated Temperatures ◽  
Tensile Load ◽  
Strength Degradation ◽  
Spall Fracture ◽  
Silicon Nitride Ceramic ◽  
Impact Tests ◽  
The Impact ◽  
Bending Fracture

A new high quality turbine system using monolithic silicon-nitride ceramic is under development. In this study particle impact tests of the silicon-nitride have been tried at room and elevated temperatures with and without tensile load, which simulates centrifugal force of blade rotation. In the experiment 1 mm diameter particle is impacted at velocities up to 900 m s−1. In this paper, critical velocities for bending fracture and Hertzian cracks are examined. Moreover, strength degradation at elevated temperature and spall fracture of the blade are discussed. The main results are: 1) The bending fracture mode critical impact velocity for soft particles is higher than that for hard particles. 2)The impact parameter ϕ for initiation of Hertzian cracks ranges 1.08×10−5 – 1.56×10−5 for the materials tested. 3)Strength degradation at elevated temperature was clearly observed. 4) In the impact tests on blades spall fracture, which was caused by interaction of stress waves, appeared.

Microstructure and tribological properties of TiZrV0.5Nb0.5Al refractory high entropy alloys at elevated temperature

Wear ◽  
2021 ◽  
pp. 204166
Author(s):  
Xuhui Pei ◽  
Yin Du ◽  
Xiaoxiao Hao ◽  
Hanming Wang ◽  
Qing Zhou ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Tribological Properties ◽  
High Entropy Alloys ◽  
High Entropy

The microstructure and tribological properties of molybdenum and silicon nitride composite films

2020 ◽  
Vol 401 ◽  
pp. 126238
Author(s):  
Hongbo Ju ◽  
Ran Wang ◽  
Wenxiang Wang ◽  
Junhua Xu ◽  
Lihua Yu ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Tribological Properties ◽  
Composite Films
Sign in / Sign up

Export Citation Format

Share Document