Your browser doesn't support javascript.
loading
Remarkable toughness of a nanostructured medium-entropy nitride compound.
Chen, Yujie; An, Xianghai; Zhou, Zhifeng; Ma, Jisheng; Munroe, Paul; Zhang, Sam; Xie, Zonghan.
Afiliación
  • Chen Y; Centre for Advanced Thin Films and Devices, School of Materials and Energy, Southwest University, Chongqing 400715, China. yujie.chen@adelaide.edu.au.
  • An X; School of Mechanical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia.
  • Zhou Z; School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia.
  • Ma J; Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China.
  • Munroe P; Monash X-ray Platform and Department of Materials Science & Engineering, Monash University, Clayton, VIC 3800, Australia.
  • Zhang S; School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
  • Xie Z; Centre for Advanced Thin Films and Devices, School of Materials and Energy, Southwest University, Chongqing 400715, China. yujie.chen@adelaide.edu.au.
Nanoscale ; 13(35): 15074-15084, 2021 Sep 17.
Article en En | MEDLINE | ID: mdl-34533548
A novel medium-entropy nitride (MEN) - CrCoNiN doped with Al and Ti was prepared using magnetron sputtering. The new MEN possesses a single-phase face-centered cubic (FCC) structure, offering a superior combination of hardness (∼21.2 GPa) and fracture toughness (∼4.53 MPa m1/2) that surpasses those of most of the conventional and high-entropy ceramics. The ultrahigh hardness value is attributed to a combined effect of lattice friction, solid solution, nanograin structure and compressive residual stress. The exceptional damage tolerance of the new nitride is underlain by the formation and operation of multiple steady shear bands and amorphization mediated by dislocation accumulations. The discovery of the deformation-induced amorphization and extensive shear banding in the MEN, in conjunction with the mechanistic understanding of the critical roles of high dislocation density and large lattice resistance in dislocation-mediated solid-state amorphization, opens up a new frontier for the development of damage-tolerant MPENs for application under extreme loading conditions.
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido