NDLI: Residual stresses in particle-reinforced ceramic composites using synchrotron radiation

Content Provider	Springer Nature Link
Author	Lee, Myungae Xiao, Yanan Wittmer, D. E. Graber, T. J. Mini, S. M.
Copyright Year	2002
Abstract	Residual stresses were determined in particle-reinforced ceramic composites using synchrotron based x-ray diffraction. The baseline Si$_{3}$N$_{4}$ and the Si$_{3}$N$_{4}$-TiN composites were processed by turbomilling, pressure casting, and isopressing. They were then continuously sintered to full density, under a pressureless, flowing nitrogen atmosphere. The flexural strength, fracture toughness, and residual stress were measured for as-machined samples and following quenching in water from 1000°C, 1100°C, and 1200°C. The residual stresses for both the baseline Si$_{3}$N$_{4}$ and the Si$_{3}$N$_{4}$-TiN composites were determined from the (441) and (531) reflections, by applying the 2Θ-sin$^{2}$ψ method. The measured residual stresses were compared with the flexural strength and fracture toughness results to determine the effects of residual stress and thermal shocking on the mechanical properties of each material. In both the baseline Si$_{3}$N$_{4}$ and Si$_{3}$N$_{4}$-TiN composites, after thermal shocking, the compressive residual stresses were developed in directions both parallel and perpendicular to the sample surface. The residual compressive stresses for the Si$_{3}$N$_{4}$-TiN composites were much higher than the baseline Si$_{3}$N$_{4}$. As a result, both fracture toughness and flexural strength of the Si$_{3}$N$_{4}$-TiN composites were improved. In addition, the addition of the TiN appears to improve both the strength and toughness of the baseline Si$_{3}$N$_{4}$.
Starting Page	4437
Ending Page	4443
Page Count	7
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	37
Issue Number	20
e-ISSN	15734803
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2002-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polymer Sciences Industrial Chemistry/Chemical Engineering Characterization and Evaluation Materials Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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