TY - JOUR
T1 - Review on Recent Advancements in Severe Plastic Deformation of Oxides by High-Pressure Torsion (HPT)
AU - Edalati, Kaveh
N1 - Funding Information:
The author acknowledges Prof. Zenji Horita of the IRC-GSAM Center, Kyushu University, Japan for fruitful discussion, and the MEXT, Japan for a Grant-in-Aid for Scientific Research (B) (No. 16H04539).
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/1
Y1 - 2019/1
N2 - Severe plastic deformation (SPD) of oxides has been of interest in mineralogy and geology for many decades, but oxides have ionic or covalent bonds with brittle nature and can hardly be deformed at ambient temperature. SPD processing of oxides is first realized in 1930s, when Percy W. Bridgman introduce the principles of high-pressure torsion (HPT) method. Although the method is widely used nowadays to produce ultrafine-grained (UFG) metals, the application of method for SPD processing of oxides is quite limited. This article reviews some of the recent publications on the application of HPT method to oxide ceramics (Al 2 O 3 , ZrO 2 , TiO 2 , Y 2 O 3 , ZnO, and BaTiO 3 ) and summarizes their major findings: powder compaction and partial consolidation, nanograin formation, formation of different kinds of lattice defects such as dislocations and oxygen vacancies, strain and grain size dependence of phase transformations, and improvement of functional properties such as bandgap narrowing, photoluminescence, photocatalytic activity, and dielectricity.
AB - Severe plastic deformation (SPD) of oxides has been of interest in mineralogy and geology for many decades, but oxides have ionic or covalent bonds with brittle nature and can hardly be deformed at ambient temperature. SPD processing of oxides is first realized in 1930s, when Percy W. Bridgman introduce the principles of high-pressure torsion (HPT) method. Although the method is widely used nowadays to produce ultrafine-grained (UFG) metals, the application of method for SPD processing of oxides is quite limited. This article reviews some of the recent publications on the application of HPT method to oxide ceramics (Al 2 O 3 , ZrO 2 , TiO 2 , Y 2 O 3 , ZnO, and BaTiO 3 ) and summarizes their major findings: powder compaction and partial consolidation, nanograin formation, formation of different kinds of lattice defects such as dislocations and oxygen vacancies, strain and grain size dependence of phase transformations, and improvement of functional properties such as bandgap narrowing, photoluminescence, photocatalytic activity, and dielectricity.
UR - http://www.scopus.com/inward/record.url?scp=85050451795&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85050451795&partnerID=8YFLogxK
U2 - 10.1002/adem.201800272
DO - 10.1002/adem.201800272
M3 - Review article
AN - SCOPUS:85050451795
SN - 1438-1656
VL - 21
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
IS - 1
M1 - 1800272
ER -