Ceramic turbocharger info source??

[Chris Wilson]

Slightly skewed topic,please forgive me,but no doubt someone here can 
point me to an online source of information with regard to ceramic 
tubocharger technology.For example,the Toyota MR2 turbo proudly 
displays a badge "Twin entry ceramic turbo" within the engine 
bay.What I want to know is if the shaft,impeller wheel(s) or bearings 
are "ceramic".

Thanks.


-- 
               Best Regards,
                        Chris Wilson.
              http://www.maximum-bhp.u-net.com