Superb nanocrystalline alloys for plating developed

 
Post new topic   Reply to topic    Institute of Nanotechnology Forum Index -> Nanomaterial
View previous topic :: View next topic  
Author Message
nanoorg
Site Admin


Joined: 16 Mar 2004
Posts: 1392

PostPosted: Tue Dec 05, 2006 1:52 pm    Post subject: Superb nanocrystalline alloys for plating developed Reply with quote

Superb nanocrystalline alloys for plating developed


With high rigidity and antiwear performance, nanocrystalline metals and their alloys can find wide applications in surface protection. However, the existence of grain boundaries often leads to erosive micro-batteries which accelerate the process of corrosion. Therefore, it has already become a key issue for surface engineering researchers to find nano materials with higher lubricating, anticorrosion and antiwear capacities.

Functionally graded nanocrystalline (NC) Ni-Co/CoO plating with excellent lubricating, anticorrosion and antiwear performances has recently been fabricated by the State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics (LICP) under CAS (Chinese Academy of Sciences).

The research group, headed by CAS member XUE Qunji and "Bairen (Hundreds Talent) Program" awardee ZHANG Junyan, originally borrowed an idea of functionally graded materials (FGMs) into the design and experiment of lubricative plating. They well controlled the deposit composition as well as the grain size and phase structure during the process of electro-deposition, and after cyclic thermal oxidation functionally graded nanocrystalline Ni-Co/CoO was successfully turned out.

In addition to enhanced corrosion resistance in both NaOH and NaCl solutions, the NC Ni-Co/CoO plating shows improved good wear resistance when compared with the NC Ni and Ni-Co graded plating under dry sliding wear conditions.

This study was reviewed as early as in April, 2005 by the Research Highlights column of Advanced Coatings and Surface Technology Alert website. The latest research result, published in Nanotechnology (vol.17, 2006), has won high praises from the magazine reviewers --"it does make a valuable contribution in the field of tribology and corrosion protection."


Source : http://www.nanowerk.com/
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Institute of Nanotechnology Forum Index -> Nanomaterial All times are GMT
Page 1 of 1
 

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2002 phpBB Group