Abstract

A test method for the evaluation of the adhesive strength of coatings of thickness less than 250 µms has been attempted on coupons of pure alumina and alumina-13 wt% titania samples plasma sprayed on low alloy steel substrates. Crosshatches were made with a diamond tipped wheel with 0.02-mm width and 20-mm bore diameter, which was mounted on a common tooling and grinding machine. Cuts with 5×5 mm were made on the as-sprayed surface; subsequently, a pressure-sensitive tape was applied on the hatched surface and pulled off. The area of the coatings thus removed was interpreted in accordance with ASTM D 3359B testing standard; the testing method seems to be appropriate for qualitative evaluations.

Issue Section:
Technical Notes
Keywords:
plasma spraying, adhesive strength measurements, ASTM C 633, ASTM D 3359, crosshatch testing

References

1.
ASTM Test Method C 633-01, “
Standard Test Method for Adhesion Strength of Thermal-sprayed Coatings
,”
Annual Book of ASTM Standards
,
ASTM International
,
West Conshohocken, PA
,
2001
.
2.
Center for Devices and Radiological Health (CDRH) Facts on Demand Report
No. 946, Guidance for Industry and for FDA Reviewers/staff, “
Guidance for the Industry on the Testing of Metallic Plasma Sprayed Coatings on Orthopedic Implants to Support Reconsideration of Post Market Surveillance Requirements
,”
2000
, pp.
1
-
9
.
3.
Dallirie
,
S.
, “
Hard Arc-sprayed Coatings with Enhanced Erosion and Abrasion Resistance
,”
Thermal-spray Engineering via Applied Research
,
ASM International
,
Berndt
 
C. C.
, Ed.,
2000
, pp.
575
-
582
.
Google Scholar
Crossref
Search ADS
 
4.
Trice
,
R. W.
 and
Faber
,
K. T.
, “
Role of Lamella Morphology on the Microstructure and Mechanical Properties of Plasma Sprayed Pure Alumina
,”
J. Am. Ceram. Soc.
 0002-7820, Vol.
83
, No.
4
,
2000
, pp.
889
-
896
.
Google Scholar
Crossref
Search ADS
 
5.
ASTM Test Method D 3359-97, “
Standard Test Method for Testing Adhesion by Tape Test
,”
Annual Book of ASTM Standards
,
ASTM International
,
West Conshohocken, PA
,
1997
.
6.
Venkataraman
,
R.
, “
Study on Phase Stability and Correlation to the Adhesive Strength of Plasma Sprayed Oxide Ceramic Coatings on Low Alloy Steel Substrates
,” Ph.D. thesis,
Indian Institute of Technology-Madras
, Chennai,
2004
.
This content is only available via PDF.
All rights reserved. This material may not be reproduced or copied, in whole or in part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of ASTM International.
You do not currently have access to this content.