In situ observations of cracking in constrained sintering
Abstract
Abstract In this paper, we examine the long‐standing problem of cracking during constrained sintering of a powder aggregate. Using binder jet 3D printing, we prepare ceramic green bodies in the form of center‐notched panels, then use in situ imaging to observe how cracks nucleate and grow from the notch as the material sinters under restraint. Quantitative image analysis allows us to identify important characteristics of the sinter‐cracking process, indicating a framework for analyzing the problem and developing methods for avoiding it, including representation of sinter‐cracking as a creep crack growth process, use of fracture mechanics parameters to design specimen geometries that do not exceed critical stress intensities, and the possibility of exploiting the inherently ductile nature of sinter‐cracking to mitigate damage.
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1461936
- Alternate Identifier(s):
- OSTI ID: 1457594
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the American Ceramic Society
- Additional Journal Information:
- Journal Volume: 0; Journal Issue: 0; Journal ID: ISSN 0002-7820
- Publisher:
- American Ceramic Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; fracture; in situ imaging; sinter/sintering; solid freeform fabrication
Citation Formats
Carazzone, Joseph R., Bonar, Michael D., Baring, Henry W., Cantu, Mark A., and Cordero, Zachary C. In situ observations of cracking in constrained sintering. United States: N. p., 2018.
Web. doi:10.1111/jace.15868.
Carazzone, Joseph R., Bonar, Michael D., Baring, Henry W., Cantu, Mark A., & Cordero, Zachary C. In situ observations of cracking in constrained sintering. United States. https://doi.org/10.1111/jace.15868
Carazzone, Joseph R., Bonar, Michael D., Baring, Henry W., Cantu, Mark A., and Cordero, Zachary C. Mon .
"In situ observations of cracking in constrained sintering". United States. https://doi.org/10.1111/jace.15868. https://www.osti.gov/servlets/purl/1461936.
@article{osti_1461936,
title = {In situ observations of cracking in constrained sintering},
author = {Carazzone, Joseph R. and Bonar, Michael D. and Baring, Henry W. and Cantu, Mark A. and Cordero, Zachary C.},
abstractNote = {Abstract In this paper, we examine the long‐standing problem of cracking during constrained sintering of a powder aggregate. Using binder jet 3D printing, we prepare ceramic green bodies in the form of center‐notched panels, then use in situ imaging to observe how cracks nucleate and grow from the notch as the material sinters under restraint. Quantitative image analysis allows us to identify important characteristics of the sinter‐cracking process, indicating a framework for analyzing the problem and developing methods for avoiding it, including representation of sinter‐cracking as a creep crack growth process, use of fracture mechanics parameters to design specimen geometries that do not exceed critical stress intensities, and the possibility of exploiting the inherently ductile nature of sinter‐cracking to mitigate damage.},
doi = {10.1111/jace.15868},
journal = {Journal of the American Ceramic Society},
number = 0,
volume = 0,
place = {United States},
year = {Mon Jun 11 00:00:00 EDT 2018},
month = {Mon Jun 11 00:00:00 EDT 2018}
}
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Figures / Tables:
Fig. 1: (a) Front profile of the notched panel specimen placed in the stainless steel restraining fixture, showing relevant dimensions. The open slot in the top part of the fixture prevents stress build-up due to thermal expansion. The axes indicate the direction of build, printhead travel, and powder recoat. (b)more »
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Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.