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Title: Mechanical behavior of segmented oxide protected coatings

Abstract

Mechanically and thermally induced fractures were examined in sputtered coatings consisting of a NiCrAlY underlayer, either a thin or a thick transition layer graded from NiCrAlY to ZrO/sub 2/, and an outer ZrO/sub 2/ layer. A pronounced columnar (fibrous) microstructure was obtained, although the columnar boundaries in the ZrO/sub 2/ layers and in the thick transition layers were much more open than in the NiCrAlY, effectively producing a more segmented structure. Fractures in the coatings with thick transition layers always followed the columnar boundaries and did not affect coating adherence. Fractures in the coatings with thin transition layers were similar except that fractures in the transition layer and parallel to the layer plane were observed in addition to the columnar fractures and would be expected to result in loss of coating adherence.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest Lab., Richland, WA (USA)
OSTI Identifier:
5682085
Report Number(s):
PNL-SA-8138; CONF-800439-15
ON: DE82010662
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: International conference on metallurgical coatings, San Diego, CA, USA, 21 Apr 1980
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; SURFACE COATING; CHROMIUM ALLOYS; NICKEL ALLOYS; YTTRIUM ALLOYS; ZIRCONIUM OXIDES; ADHESION; FRACTURES; SURFACE PROPERTIES; ALLOYS; CHALCOGENIDES; DEPOSITION; FAILURES; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS; 360203* - Ceramics, Cermets, & Refractories- Mechanical Properties; 360103 - Metals & Alloys- Mechanical Properties

Citation Formats

Patten, J W, Prater, J T, Hays, D D, and Moss, R W. Mechanical behavior of segmented oxide protected coatings. United States: N. p., 1980. Web.
Patten, J W, Prater, J T, Hays, D D, & Moss, R W. Mechanical behavior of segmented oxide protected coatings. United States.
Patten, J W, Prater, J T, Hays, D D, and Moss, R W. 1980. "Mechanical behavior of segmented oxide protected coatings". United States.
@article{osti_5682085,
title = {Mechanical behavior of segmented oxide protected coatings},
author = {Patten, J W and Prater, J T and Hays, D D and Moss, R W},
abstractNote = {Mechanically and thermally induced fractures were examined in sputtered coatings consisting of a NiCrAlY underlayer, either a thin or a thick transition layer graded from NiCrAlY to ZrO/sub 2/, and an outer ZrO/sub 2/ layer. A pronounced columnar (fibrous) microstructure was obtained, although the columnar boundaries in the ZrO/sub 2/ layers and in the thick transition layers were much more open than in the NiCrAlY, effectively producing a more segmented structure. Fractures in the coatings with thick transition layers always followed the columnar boundaries and did not affect coating adherence. Fractures in the coatings with thin transition layers were similar except that fractures in the transition layer and parallel to the layer plane were observed in addition to the columnar fractures and would be expected to result in loss of coating adherence.},
doi = {},
url = {https://www.osti.gov/biblio/5682085}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 01 00:00:00 EST 1980},
month = {Tue Apr 01 00:00:00 EST 1980}
}

Conference:
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