Work

Morphological Evolution and Weak Interface Development Within CVD-Zirconia Coating Deposited on Hi-Nicalon Fiber

Year: 2013

Type: article

Abstract: The phase contents and morphology of a ZrO2 fiber coating deposited at 1050 C on Hi-Nicalon(Tm) by chemical vapor deposition were examined as a function of deposition time from 5 to 120 min. The morphological evolution in the ZrO2 coating was correlated to the development of delamination within the ZrO2 coating. The delamination appears to occur as a result of: (1) continuous formation of tetragonal ZrO2 nuclei on the deposition surface; (2) martensitic transformation of the tetragonal phase to a monoclinic phase upon reaching a critical grain size; and (3) development of significant compressive hoop stresses due to the volume dilation associated with the transformation. Our observations suggest that it will be of critical importance to further understand and eventually control the nucleation and grain growth behavior of CVD ZrO2 and its phase transformation behavior for its potential applications for composites.

Source: NASA STI Repository (National Aeronautics and Space Administration)

Authors: Hao Li, Jinil Lee, Matthew Libera, Woo Y. Lee, Anteneh Kebbede, Michael J. Lance, Hongyu Wang, Gregory N. Morscher, Hugh R. Gray

Institutions: Stevens Institute of Technology, General Electric (United States), Oak Ridge National Laboratory, Ohio Aerospace Institute

Language: English

Topic: Advanced ceramic materials synthesis

Subfield: Ceramics and Composites

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy, Division of Materials Research, Basic Energy Sciences, Air Force Research Laboratory, Division of Materials Sciences and Engineering

Award: GOALI: Multilayered Oxide Fiber Coating Concept for Environmentally Durable SiC/SiC Composites

OpenAlex ID: W828310324

FWCI:

Cites:

Cited by: 4

Related to: 10