A reversible phase transformation (RPT) process is observed that converts fully dense polycrystalline Y2O3 directly into the nanocrystalline state. The process involves a forward transformation from cubic‐to‐monoclinic symmetry under a high pressure and a reverse transformation from monoclinic‐to‐cubic symmetry under a lower pressure. An example is given of a reduction in grain size of cubic‐Y2O3 from 300 to 0.1 μm in a single pressure‐induced RPT at 1000°C.

I ubllc repolune urden or lhs colle*lon o n or ma^ IS esbmaled to average 1 hour per response. n u ing h e bme or m m n g msmcbons. reading apprear data wxlrt~s. enented. ai Lintainng me i t a n&. and C M n p d g L Rwlewino me dec(ion d hfompm. send t m i k d m n g mi : buden mumate oran other aspeas of *is collection ~h m t i o n llncluding SygesboItS lor reducing this burden. to Washington Headguarlers Services. Cirectwate of Infomalion Operaurns and Repxk. 121iJefferson Davls hlghviay. Suite 1204. Arynglc VA 222024 2. and to the OMEe of Management and Budpet, Reduction P~(0 7 0 4-0 1 6 5). Washlngton. DC 20355 '. DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

No abstract

No abstract