Influence of Zirconia Incorporation on the Mechanical and Chemical Properties of Ni-Co Alloys
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
Influence of Zirconia Incorporation on the Mechanical and Chemical Properties of Ni-Co Alloys
|
|
| Creator |
Meenu, Srivastava
William Grips, VK |
|
| Subject |
Chemistry and Materials (General)
|
|
| Description |
Ni-Co-ZrO2 nano-composites are electrodeposited from sulphamate electrolyte and a comparison is made with Ni-ZrO2 in terms of structure and properties. The Co content in the coatings is in the range of 10-80wt%. The deposition conditions like current density, pH are optimized in terms of microhardness and amounts of ZrO2 incorporated. The micro-hardness studies revealed that the maximum hardness is exhibited by Ni-28Co-2ZrO2 composite. The FESEM study showed a change in morphology from polyhedral to ridge with increase in Co content from 10 to 80wt%. A change in crystal structure from fcc to hcp is also seen. The effect of annealing treatment in terms of microhardness is studied by subjecting the com-posite electroforms to 800℃. The Co rich composite exhibited better stability compared to Ni rich composites. Ni-28Co-2ZrO2 composite exhibited better immersion corrosion resistance while, Ni-ZrO2 composite displayed better elec-trochemical corrosion resistance. The wear studies showed that Ni-10Co-2ZrO2, Ni-28Co-2ZrO2 composites showed better resistance. Thus, it is seen that the coatings can be tailored to suit various applications.
|
|
| Publisher |
Scientific and Academic Publishing
|
|
| Date |
2011
|
|
| Type |
Journal Article
PeerReviewed |
|
| Format |
application/pdf
|
|
| Identifier |
http://nal-ir.nal.res.in/10951/1/NiCoZrO2.pdf
Meenu, Srivastava and William Grips, VK (2011) Influence of Zirconia Incorporation on the Mechanical and Chemical Properties of Ni-Co Alloys. American Journal of Materials Science, 1 (2). pp. 113-122. |
|
| Relation |
http://nal-ir.nal.res.in/10951/
|
|