Dry sliding wear properties of a 7075-T6 aluminum alloy coated with Ni-P (h) in different pretreatment conditions.
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
Dry sliding wear properties of a 7075-T6 aluminum alloy coated with Ni-P (h) in different pretreatment conditions.
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| Creator |
Sudagar, Jothi
Venkateswarlu, K Lian, Jainshe |
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| Subject |
Chemistry and Materials (General)
Metals and Metallic Materials |
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| Description |
Dry sliding wear behavior of electroless nickel-phosphorus (EN) coating of thickness ~35 lm deposited on
a 7075-T6 aluminum alloy was studied. EN was deposited from a bath with sodium hypophosphite as a
reducing agent. In as-deposited conditions, plating with 6-9 wt.% phosphorus has a mixture of amorphous
and microcrystalline phase. Three pretreatments of Zn (zincate), Ni strike and absorbed hypophosphite
layer were given to the substrate before EN coating to examine their wear performance. The surface
morphology of the pretreatments was studied by a confocal laser scanning microscope. The performances of
these pretreatments of EN were evaluated by dry sliding wear studies and followed by SEM studies. The
results suggest that the wear behavior of EN mostly depends on the pretreatment conditions. Heat treatment
at temperature of 400 oC can enhance the wear resistance properties for all types of pretreatment
conditioned samples and in addition that the average coefficient of friction of 400 oC specimens (lav) had
minimum value as compared to 200 oC specimens. Ni strike provided better interlocking adhesion between
EN and Al and this pretreatment noticeably improved the wear, frictional and hardness behavior of the EN
coatings on 7075 Al substrate and further enhanced it by heat treatment of 400 oC/h.
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| Publisher |
Springer US
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| Date |
2010-08
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| Type |
Journal Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://nal-ir.nal.res.in/9981/1/sudagar_7075_wear_paper.pdf
Sudagar, Jothi and Venkateswarlu, K and Lian, Jainshe (2010) Dry sliding wear properties of a 7075-T6 aluminum alloy coated with Ni-P (h) in different pretreatment conditions. Journal of Materials Engineering and Performance, 19 (6). pp. 810-818. ISSN 1059-9495 |
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| Relation |
http://dx.doi.org/10.1007/s11665-009-9545-0
http://nal-ir.nal.res.in/9981/ |
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