zirconia ceramics
zirconia ceramics
(OP)
I am working on zirconia-3%yttria material cutting blades. The problem is that the blades have to be autoclave sterized. Under such conditions they may deteriorate. I am stuck with commercial 3%yttria material.
Is there a way to, say, surface modify the material in order to stabilize it without compromising good mechanical properties?
Also, what would be the optimum firing schedule for small size zirconia-3%yttria parts in order to fully develop best mechanical properties?
Is there a way to, say, surface modify the material in order to stabilize it without compromising good mechanical properties?
Also, what would be the optimum firing schedule for small size zirconia-3%yttria parts in order to fully develop best mechanical properties?
Slawomir
www.pkerengineering.com





RE: zirconia ceramics
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: zirconia ceramics
I appreciate an interesting link.
Slawomir
www.pkerengineering.com
RE: zirconia ceramics
Bruce
www.accuratus.com
RE: zirconia ceramics
I am trying to stay within the US-bounds. I have been exposed to bits and pieces of info regarding different types of zirconia ceramics. I made a number of commercial parts. One of the candidates is scandia-stabilized (or partially stabilized) material but it sets things back to the square one. Anyway, the general idea is: can we somehow figure-out how to make a standard, commercially available 3%yttria material to perform up to our expectations? Can we surface modify it? Is there another way to make it work?
Slawomir
www.pkerengineering.com
RE: zirconia ceramics
exposure.?
Here are links to some information about various Zirconium Oxide
materials. Zircoa at one time has the best source for information. Both Dynamic Ceramics and Refractron make different Zirconium oxide formulations.
http://www.zircoa.com/index.html
http://www.dynacer.com/zirconia.htm
http://refractron.com/MgPSZ_ceramics.asp
Addenda:
Problems with stabilized Zirconium Oxide in ball valves installed on polymer autoclaves nearly did us in. The problem was with 4" dia balls for valves that had worked alright during test started failing while holding 2000 lbs of polymer at 283C and 250 psig. Investigation revealed that operations had change their process in such a way to cause the valve to see an additional 40C differential when charging the autoclave. The Zirconium Oxide balls couldn't take the additional thermal shock.
RE: zirconia ceramics
There was a fair body of research done in the 1980's during Reagan's Star Wars years. I no longer have the references but they may be available from the American Ceramic Society. They were compendiums of papers presented at the Cocoa Beach Symposia. I'll take a look through my paper files to see what I can find. In the meantime, here are two articles for your consideration. It looks like you might be trying to beat Mother Nature at her own game.
Bruce
www.accuratus.com
RE: zirconia ceramics
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: zirconia ceramics
I just wonder, in general terms: what could be possibly done to a regular 3%yttria material to improve it for this particular application. We are talking here pretty small, thin pieces with sharp cutting edge.
Slawomir
www.pkerengineering.com
RE: zirconia ceramics
http://w
You could contact the author (that's his website) to see if he has any suggestions.
Everything I've read so far looks at reformulating the base material (see the linked article re: oxalic acid); nothing's come up about surface treating.
RE: zirconia ceramics
Here is what I have been thinking/hoping for: is it possible to surface treat a piece of decent PSZ zirconia in order to prevent it from deterioration coming from moderately overheated steam? Could it be some kind of CVD coat or pack cementation treatment the answer?
Slawomir
www.pkerengineering.com
RE: zirconia ceramics
Bruce
www.accuratus.com
RE: zirconia ceramics
Slawomir
www.pkerengineering.com
RE: zirconia ceramics
I would try to get a few blades to actually check from one of several suppliers.
I would also look to Koycera and Kasumi for possible candidates for your blade.
The basic process.
h
m_content&view=article&id=113&Itemid=139
Some actual blades.
htt
My ceramic knives have been through the dishwasher numerous times with no loss in quality.
RE: zirconia ceramics
Slawomir
www.pkerengineering.com
RE: zirconia ceramics
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: zirconia ceramics
Slawomir
www.pkerengineering.com
RE: zirconia ceramics
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: zirconia ceramics
Slawomir
www.pkerengineering.com
RE: zirconia ceramics
Only because you're looking for something proprietary
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize