Any companies ever made ceramic turbine blades?
07-17-2003, 08:25 PM
#1
AudiWorld Super User
Thread Starter
Any companies ever made ceramic turbine blades?
seems to me it might be usefull. Since the turbine blade gets hotter than the impeller, a material more heat resistant would be good. Plus there is no impact to worry about from objects so material ductility isnt an issue.
im also guessing the turbine fails more often than the impeller.
im also guessing the turbine fails more often than the impeller.
07-17-2003, 08:28 PM
#3
AudiWorld Super User
Join Date: Feb 2003
Posts: 16,402
Likes: 0
Received 0 Likes
on
0 Posts
I'm no turbine expert...
but I would guess that most ceramics are too brittle. They've got the whole inconnel thing down pat and the working temperatures of Nickel-based superalloys seem to be creeping up every year.
07-17-2003, 08:39 PM
#5
AudiWorld Super User
Thread Starter
you might be surprised what ceramics can do these days, they have advanced also (edit)
plus they dont have as big a fatigue issue as metals i believe.
im not saying it would definitely work, just throwing the idea out there.
im not saying it would definitely work, just throwing the idea out there.
07-17-2003, 08:44 PM
#6
AudiWorld Super User
Join Date: Mar 2002
Posts: 17,933
Likes: 0
Received 0 Likes
on
0 Posts
problems with ceramic is overspeed..
if they overspeed for any prolonged amount of time or repeated times, they will break. inconel is much much stronger in the overspeed issue.
07-17-2003, 08:46 PM
#7
AudiWorld Super User
Join Date: Feb 2003
Posts: 16,402
Likes: 0
Received 0 Likes
on
0 Posts
It's definitely something to ponder...
I'd have to first study the prevailing failure modes of traditional turbine wheels to see how much benefit could be gained through ceramics.
Also, a high temperature differential is favorable on the hot-side of the turbocharger...so a ceramic turbine assembly may actually impede the spool up by not retaining heat.
Also, a high temperature differential is favorable on the hot-side of the turbocharger...so a ceramic turbine assembly may actually impede the spool up by not retaining heat.
Trending Topics
07-17-2003, 09:04 PM
#9
Senior Member
Join Date: Dec 2000
Posts: 5,218
Likes: 0
Received 0 Likes
on
0 Posts
sure, but do you want to pay $15k for a turbo?
some of latest jet engines use single crystal super-alloy blisks (or bladed disks). Undoubtably these types of things costs quite a bit.
07-17-2003, 09:15 PM
#10
AudiWorld Super User
Thread Starter
yes i have heard of that, growing the blade from a single crystal
so there are no slip planes and the strength is determined by the atomic bonds. When the technology becomes mature perhaps it could be used in cars.