scholarly journals Switching the fracture toughness of single-crystal ZnS using light irradiation

2021 ◽  
Vol 118 (15) ◽  
pp. 154103
Author(s):  
Tingting Zhu ◽  
Kuan Ding ◽  
Yu Oshima ◽  
Anahid Amiri ◽  
Enrico Bruder ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Single Crystal ◽  
Light Irradiation

Indentation hardness and fracture toughness in single crystal TiC0.96

1996 ◽  
Vol 209 (1-2) ◽  
pp. 329-336 ◽  
Author(s):  
C. Maerky ◽  
M.-O. Guillou ◽  
J.L. Henshall ◽  
R.M. Hooper
Keyword(s):  
Fracture Toughness ◽  
Single Crystal ◽  
Indentation Hardness

scholarly journals Arene Ruthenium Metalla-Assemblies with Anthracene Moieties for PDT Applications

Inorganics ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 97 ◽  
Author(s):  
Marie Gaschard ◽  
Farzaneh Nehzat ◽  
Thomas Cheminel ◽  
Bruno Therrien
Keyword(s):  
Molecular Structure ◽  
Single Crystal ◽  
General Formula ◽  
Structure Analysis ◽  
White Light ◽  
Light Irradiation ◽  
Synthesis And Characterization ◽  
X Ray

The synthesis and characterization of three metalla-rectangles of the general formula [Ru4(η6-p-cymene)4(μ4-clip)2(μ2-Lanthr)2][CF3SO3]4 (Lanthr: 9,10-bis(3,3’-ethynylpyridyl) anthracene; clip = oxa: oxalato; dobq: 2,5-dioxido-1,4-benzoquinonato; donq: 5,8-dioxido-1,4-naphthoquinonato) are presented. The molecular structure of the metalla-rectangle [Ru4(η6-p-cymene)4(μ4-oxa)2(μ2-Lanthr)2]4+ has been confirmed by the single-crystal X-ray structure analysis of [Ru4(η6-p-cymene)4(μ4-oxa)2(μ2-Lanthr)2][CF3SO3]4 · 4 acetone (A2 · 4 acetone), thus showing the anthracene moieties to be available for reaction with oxygen. While the formation of the endoperoxide form of Lanthr was observed in solution upon white light irradiation, the same reaction does not occur when Lanthr is part of the metalla-assemblies.

Structure and Properties of Single Crystal Al2O3 Implanted with Chromium and Zirconium

1981 ◽  
Vol 7 ◽  
Author(s):  
C. J. Mchargue ◽  
H. Naramoto ◽  
B. R. Appleton ◽  
C. W. White ◽  
J. M. Williams
Keyword(s):  
Fracture Toughness ◽  
Single Crystal ◽  
Single Crystals ◽  
Solid Solutions ◽  
Rutherford Backscattering ◽  
Structure And Properties ◽  
Indentation Fracture ◽  
Surface Layers ◽  
Indentation Fracture Toughness

ABSTRACTSingle crystals of Al2O3 were implanted with chromium and zirconium to fluences of 1 × 1016 to 1 × 1017 ions cm−2. Rutherford backscattering-channeling studies showed the surface layers to be damaged but crystalline with the implanted ions randomly distributed. The microhardness and indentation fracture toughness were higher for the random solutions than for conventionally formed solid solutions. Changes in structure and properties caused by annealing in air at temperatures up to 1800°C were studied.

Fracture toughness of single crystal YAG

1993 ◽  
Vol 28 (11) ◽  
pp. 1383-1385 ◽  
Author(s):  
T. Mah ◽  
T.A. Parthasarathy
Keyword(s):  
Fracture Toughness ◽  
Single Crystal

The evaluation of the composition dependence of fracture toughness of Al3Nb alloys by using micro-size fracture testing

MRS Advances ◽  
2017 ◽  
Vol 2 (26) ◽  
pp. 1405-1410
Author(s):  
Nobuhiro Matsuzaki ◽  
Ken-ichi Ikeda ◽  
Seiji Miura ◽  
Nobuaki Sekido ◽  
Takahito Ohmura
Keyword(s):  
Fracture Toughness ◽  
Single Crystal ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Two Phase ◽  
Fracture Testing ◽  
Average Value ◽  
Chevron Notch ◽  
Polycrystalline Alloys ◽  
Oxidation Resistant

ABSTRACTAl3Nb is known as a high oxidation resistant material, while it is quite brittle. As the fracture toughness of Al3Nb single crystal and its dependence on the composition are not obtained, the micro-sized fracture testing proposed by Suzuki et al. was performed. Al3Nb single crystal micron-order size cantilevers with a chevron-notch were fabricated in a grain of two-phase polycrystalline alloys by using FIB (Focused Ion Beam). From the load-displacement curves during the bending by a nanoindenter, the average value of fracture toughness of Nb-rich Al3Nb is evaluated to be 2.90 MPam1/2, while the fracture toughness of Al-rich Al3Nb is also evaluated to be 2.82 MPam1/2. From this result, the fracture toughness of Al3Nb is less dependent on its Al/Nb ratio. Furthermore the fracture toughness of Al3 (Nb, V) was evaluated to be 2.82 MPam1/2.The fracture toughness of Al3Nb is seemingly insensitive to V addition.

scholarly journals Evaluation of the Fracture Toughness of Micro-sized Single Crystal Silicon Wafers

2005 ◽  
Vol 125 (7) ◽  
pp. 302-306 ◽  
Author(s):  
Satoru Koyama ◽  
Kazuki Takashima ◽  
Yakichi Higo
Keyword(s):  
Fracture Toughness ◽  
Single Crystal ◽  
Single Crystal Silicon ◽  
Silicon Wafers ◽  
Crystal Silicon

Fracture Toughness of Single-Crystal Silicon Carbide

1977 ◽  
Vol 60 (7-8) ◽  
pp. 373-375 ◽  
Author(s):  
J. L. HENSHALL ◽  
D. J. ROWCLIFFE ◽  
J. W. EDINGTON
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Single Crystal ◽  
Single Crystal Silicon ◽  
Crystal Silicon

Fracture Toughness Measurement of a Micro-Sized Single Crystal Silicon

2005 ◽  
Vol 297-300 ◽  
pp. 292-298 ◽  
Author(s):  
Satoru Koyama ◽  
Kazuki Takashima ◽  
Yakichi Higo
Keyword(s):  
Fracture Toughness ◽  
Single Crystal ◽  
Ion Beam ◽  
Testing Machine ◽  
Single Crystal Silicon ◽  
Mems Devices ◽  
Type Specimens ◽  
Crystal Silicon ◽  
Fracture Toughness Measurement ◽  
Toughness Measurement

Reliability is one of the most critical issues for designing practical MEMS devices. In particular, the fracture toughness of micro-sized MEMS elements is important, as micro/nano-sized flaws can act as a crack initiation sites to cause failure of such devices. Existing MEMS devices commonly use single crystal silicon. Fracture toughness testing upon micro-sized single crystal silicon was therefore carried out to examine whether a fracture toughness measurement technique, based upon the ASTM standard, is applicable to 1/1000th sized silicon specimens. Notched cantilever beam type specimens were prepared by focused ion beam machining. Two specimens types with different notch orientations were prepared. The notch plane/direction were (100)/[010], and (110)/[ ＿ ,110], respectively. Fracture toughness tests were carried out using a mechanical testing machine for micro-sized specimens. Fracture has been seen to occur in a brittle manner in both orientations. The provisional fracture toughness values (KQ) are 1.05MPam1/2 and 0.96MPam1/2, respectively. These values meet the micro-yielding criteria for plane strain fracture toughness values (KIC). Fracture toughness values for the orientations tested are of the same order as values in the literature. The results obtained in this investigation indicate that the fracture toughness measurement method used is applicable for micro-sized components of single crystal silicon in MEMS devices.

Fracture toughness and crack growth phenomena of plasma-etched single crystal silicon

2000 ◽  
Vol 83 (1-3) ◽  
pp. 194-199 ◽  
Author(s):  
A.M Fitzgerald ◽  
R.H Dauskardt ◽  
T.W Kenny
Keyword(s):  
Fracture Toughness ◽  
Single Crystal ◽  
Crack Growth ◽  
Single Crystal Silicon ◽  
Crystal Silicon

2839 Size and temperature effects on fracture toughness of single crystal silicon film

2007 ◽  
Vol 2007.1 (0) ◽  
pp. 733-734
Author(s):  
Shigeki NAKAO ◽  
Taeko ANDO ◽  
Mitsuhiro SHIKIDA ◽  
Kazuo SATO
Keyword(s):  
Fracture Toughness ◽  
Single Crystal ◽  
Temperature Effects ◽  
Silicon Film ◽  
Single Crystal Silicon ◽  
Crystal Silicon
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