Theoretical strength and onset of yielding in nanoindentation
Project goals
Nanoindentation has emerged as the most important probe for investigation of mechanical properties of materials over dimensions ranging from a few nanometers to a few microns. The onset of yielding at nanoscale is controlled by homogeneous nucleation of,dislocations in the small volume of material subject to loads approaching the theoretical strength, i.e. the strength of an ideal (defect-free) solid. The purpose of the project is to calculate the theoretical strength using quantum-mechanical electronic, structure methods and to interpret corresponding nanoindentation experiments.,
Keywords
theoretical strengthnanoindentationelectronic structureonset of yielding
Public support
Provider
Ministry of Education, Youth and Sports
Programme
COST
Call for proposals
COST 2 (SMSM200232004)
Main participants
Ústav fyziky materiálů AV ČR, v. v. i.
Contest type
VS - Public tender
Contract ID
—
Alternative language
Project name in Czech
Teoretická pevnost a začátek skluzu při nanoindentaci
Annotation in Czech
Nanoindentace je důležitá metoda zkoumání mechanických vlastností materiálů v nanometrovém až mikrometrovém měřítku. Začátek skluzu v nanometrovém měřítku je způsoben homogenní nukleací dislokací v malém objemu materiálu při napětích dosahujících teoreti, cké pevnosti, tj. pevnosti ideálního (bezdefektního) materiálu. Cílem projektu jsou kvantově mechanické výpočty teoretické pevnosti na základě elektronové struktury materiálů a interpretace příslušných nanoindentačních experimentů., ,
Scientific branches
R&D category
NV - Nonindustrial research (Applied research excluded Industrial research)
CEP classification - main branch
BM - Solid-state physics and magnetism
CEP - secondary branch
BE - Theoretical physics
CEP - another secondary branch
JJ - Other materials
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
20502 - Paper and wood
20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)
21001 - Nano-materials (production and properties)
21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)
Completed project evaluation
Provider evaluation
U - Uspěl podle zadání (s publikovanými či patentovanými výsledky atd.)
Project results evaluation
presentation at international conferences; publishing in technical papers
Solution timeline
Realization period - beginning
Jan 1, 2002
Realization period - end
Jan 1, 2004
Project status
U - Finished project
Latest support payment
—
Data delivery to CEP
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data delivery code
CEP/2005/MSM/MSM5OC/U/N/4:2
Data delivery date
May 28, 2008
Finance
Total approved costs
2,381 thou. CZK
Public financial support
826 thou. CZK
Other public sources
0 thou. CZK
Non public and foreign sources
1,555 thou. CZK
Basic information
Recognised costs
2 381 CZK thou.
Public support
826 CZK thou.
34%
Provider
Ministry of Education, Youth and Sports
CEP
BM - Solid-state physics and magnetism
Solution period
01. 01. 2002 - 01. 01. 2004