Multi-functional nano-porous ceramics

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ceramics are stiff, hard, lightweight, and thermally stable (> 1000 °C), but are rarely used in structural components due to their brittleness. If toughened, ceramics can be an effective, light-weight alternative to existing metal components that are currently used for high-temperature applications and/or for protection coatings against heat and radiation. Recent investigations on toughening of ceramics has been mostly focused on introducing particles, fibers, and whiskers to arrest and/or deflect crack initiation and propagation. Another common toughening method is compositing with ductile phases, such as metals and polymers, but thermal stability of the resulting composites is lower. In this work, a novel toughening method is attempted by introducing nano-porosity to monolithic ceramics without degrading thermal stability. Traditionally, pores are considered as defects, but when pores are very small (<∼100 nm), the nano-pores are observed to deform locally in a non-propagating manner. Thus, fracture toughness can be potentially increased by such quasi-plastic deformations uniquely triggered by locally weak nano-porosity. In this project, we study to understand the fundamental toughening mechanisms of ceramics that arise from the introduction of nano-pores, and to study a scalable manufacturing method of these novel tough and strong ceramics. If achieved, tougher ceramics will be in high demand as improved lightweight alternatives to metal alloys in structural applications that require mechanical strength, stability in thermal and corrosive environment, such as engines, gas turbines, thermal protections, nuclear and solar energy and biomechanics.

Original languageEnglish (US)
Title of host publication33rd Technical Conference of the American Society for Composites 2018
PublisherDEStech Publications Inc.
Pages1958-1964
Number of pages7
ISBN (Electronic)9781510872073
StatePublished - Jan 1 2018
Event33rd Technical Conference of the American Society for Composites 2018 - Seattle, United States
Duration: Sep 24 2018Sep 27 2018

Publication series

Name33rd Technical Conference of the American Society for Composites 2018
Volume3

Other

Other33rd Technical Conference of the American Society for Composites 2018
CountryUnited States
CitySeattle
Period9/24/189/27/18

Fingerprint

Toughening
Metals
Thermodynamic stability
Porosity
Crystal whiskers
Caustics
High temperature applications
Biomechanics
Brittleness
Crack initiation
Nuclear energy
Solar energy
Strength of materials
Gas turbines
Fracture toughness
Crack propagation
Plastic deformation
Polymers
Engines
Radiation

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Surfaces, Coatings and Films
  • Metals and Alloys

Cite this

Yamamoto, N., Singh, J., & Dai, J. (2018). Multi-functional nano-porous ceramics. In 33rd Technical Conference of the American Society for Composites 2018 (pp. 1958-1964). (33rd Technical Conference of the American Society for Composites 2018; Vol. 3). DEStech Publications Inc..
Yamamoto, Namiko ; Singh, Jogender ; Dai, Jingyao. / Multi-functional nano-porous ceramics. 33rd Technical Conference of the American Society for Composites 2018. DEStech Publications Inc., 2018. pp. 1958-1964 (33rd Technical Conference of the American Society for Composites 2018).
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Yamamoto, N, Singh, J & Dai, J 2018, Multi-functional nano-porous ceramics. in 33rd Technical Conference of the American Society for Composites 2018. 33rd Technical Conference of the American Society for Composites 2018, vol. 3, DEStech Publications Inc., pp. 1958-1964, 33rd Technical Conference of the American Society for Composites 2018, Seattle, United States, 9/24/18.

Multi-functional nano-porous ceramics. / Yamamoto, Namiko; Singh, Jogender; Dai, Jingyao.

33rd Technical Conference of the American Society for Composites 2018. DEStech Publications Inc., 2018. p. 1958-1964 (33rd Technical Conference of the American Society for Composites 2018; Vol. 3).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Yamamoto N, Singh J, Dai J. Multi-functional nano-porous ceramics. In 33rd Technical Conference of the American Society for Composites 2018. DEStech Publications Inc. 2018. p. 1958-1964. (33rd Technical Conference of the American Society for Composites 2018).