Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Extensive deformation behavior of an all-oxide Al2O3-TiO2 nanostructured multilayer ceramic at room temperature
Date
2009-11-01
Author
Dericioğlu, Arcan Fehmi
Kagawa, Yutaka
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
213
views
0
downloads
Cite This
An all-oxide Al2O3-TiO2 ceramic multilayer composed of 10-100 nm thick alternating layers was fabricated using the reactive magnetron sputtering process. Microindentation tests were carried out on the multilayer ceramic followed by microstructural observations of the cross-sections of the indented sites to characterize the indentation response of the system. During the observations, it was noted that an extensive room temperature "deformation" occurred in the multilayer ceramic material. The material shows a thickness reduction of as much as similar to 40% under a conical indenter at 300 mN of load without microcracking and dislocation-assisted deformation. The room temperature deformation mechanism is governed by the relative movement and rearrangement of the anisotropic nanoscale columnar grains along the intergranular boundaries containing elongated voids. The relative sliding along the intergranular boundaries, and the subsequent granular rotation under indentation were well captured by finite element simulation.
Subject Keywords
Mechanical Engineering
,
General Materials Science
,
Mechanics of Materials
,
Condensed Matter Physics
URI
https://hdl.handle.net/11511/44512
Journal
JOURNAL OF MATERIALS RESEARCH
DOI
https://doi.org/10.1557/jmr.2009.0418
Collections
Department of Metallurgical and Materials Engineering, Article
Suggestions
OpenMETU
Core
Investigation of the variations in microstructure and mechanical properties of dual-matrix ductile iron by Magnetic Barkhausen Noise analysis
Gür, Cemil Hakan; Erdogan, Mehmet (Informa UK Limited, 2008-01-01)
The variations in the microstructure and tensile properties of dual-matrix ductile irons have been investigated non-destructively by Magnetic Barkhausen Noise (MBN) method. Specimens have been intercritically austenitised at 795 degrees C and 815 degrees C for 20 minutes, and then oil-quenched to obtain different martensite volume fractions. Two specimens, namely as-cast and oil-quenched from 900 degrees C, were prepared for comparison purpose. To investigate the effect of tempering, some specimens were tem...
Microstructural and texture evolution during thermo-hydrogen processing of Ti6Al4V alloys produced by electron beam melting
Dogu, Merve Nur; ESEN, ZİYA; Davut, Kemal; Tan, Evren; Gumus, Berkay; Dericioğlu, Arcan Fehmi (Elsevier BV, 2020-10-01)
The present study was conducted to reveal the effects of building angles and post heat-treatments (2-step Thermo-Hydrogen Processing (THP) and conventional annealing treatment) on the density, microstructure and texture of Ti6Al4V alloy parts produced by Electron Beam Melting (EBM). The results showed that regardless of the building angle; the density, microstructure and crystallographic texture (defined with respect to building angle) of the as-produced samples were identical; having Widmanstatten a struct...
Investigation of microstructure-ultrasonic velocity relationship in SiCp-reinforced aluminium metal matrix composites
Gür, Cemil Hakan (Elsevier BV, 2003-11-25)
Twenty-one sets of specimens were fabricated by hot pressing powder mixtures containing various volume and size combinations of pure Al and SiC particles. Neither heat treatment nor secondary deformation processes were applied. The microstructures of the specimens were characterised by optical and scanning electron microscopy. Using a 10 MHz probe, the velocity of ultrasonic longitudinal waves was measured. The results show that in general the ultrasonic velocity increases with an increase in SiC content. H...
Improvement of fracture resistance in a glass matrix optomechanical composite by minicomposite unit bridging
Dericioğlu, Arcan Fehmi (Elsevier BV, 2005-10-15)
Minicomposite unit bridging, which was experimentally determined to be the dominant toughening mechanism resulting in the R-curve behavior of the Al2O3-ZrO2 minicomposite-reinforced glass matrix optomechanical composite, was studied quantitatively using luminescence spectroscopy. Applied stress induced shift of the luminescence bands of the minicomposite reinforcement was calibrated. Using the experimentally obtained calibration curve, axial stresses could be mapped along the minicomposite embedded in the g...
The defect state of Yb-doped ZnO nanoparticles using thermoluminescence study
Hasanlı, Nızamı (Elsevier BV, 2019-09-01)
Shallow trapping centers in Yb-doped ZnO nanoparticles were determined using thermoluminescence (TL) measurements applied in the 10-300 K temperature region. Undoped and Yb-doped ZnO nanoparticles were synthesized by sol-gel method. TL glow curve of undoped nano-particles presented three peaks around 56, 108 and 150 K whereas one additional peak around 83 K was observed in the TL curve of Yb-doped ZnO nano-particles. The increase of Yb concentration in the nanoparticles increased the TL intensity of this ad...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
A. F. Dericioğlu and Y. Kagawa, “Extensive deformation behavior of an all-oxide Al2O3-TiO2 nanostructured multilayer ceramic at room temperature,”
JOURNAL OF MATERIALS RESEARCH
, pp. 3387–3396, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44512.