scholarly journals Comparative study on indentation fracture toughness measurements of cemented carbides

2006 ◽  
Vol 12 (4) ◽  
pp. 388
Author(s):  
M Antonov ◽  
F Sergejev
Keyword(s):  
Fracture Toughness ◽  
Comparative Study ◽  
Cemented Carbides ◽  
Indentation Fracture ◽  
Indentation Fracture Toughness

scholarly journals Vickers Indentation Fracture Toughness of Near-Nano and Nanostructured WC-Co Cemented Carbides

Metals ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 143 ◽  
Author(s):  
Tamara Aleksandrov Fabijanić ◽  
Danko Ćorić ◽  
Mateja Šnajdar Musa ◽  
Matija Sakoman
Keyword(s):  
Fracture Toughness ◽  
Cemented Carbides ◽  
Vickers Indentation ◽  
Indentation Fracture ◽  
Indentation Fracture Toughness

A Transparent and Tough β-Si3N4 Ceramic with a Whiskery Microstructure

2015 ◽  
Vol 655 ◽  
pp. 1-5
Author(s):  
Peng Xi Li ◽  
Hong Qiang Wang ◽  
Liu Cheng Gui ◽  
Jun Li ◽  
Hai Long Zhang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Amorphous Phase ◽  
Hot Pressing ◽  
High Density ◽  
Indentation Fracture ◽  
Indentation Fracture Toughness ◽  
Resultant Material

The transparent β-Si3N4ceramic with a whisker-like microstructure was prepared by hot-pressing at 2000 °C for 26 h, with MgSiN2as an additive. The resultant material achieves the maximum transmittance of 70 % at the wavelength of about 2.5 μm and the transmittance value keeps higher than 60 % in the range of 700-4500 nm wavelength, which is attributed to the very small amount of the intergranular amorphous phase along with high density. The present transparent β-Si3N4ceramic exhibits an indentation fracture toughness of 7.2±0.3 MPa m1/2.

Pulsed Electric Current Sintered Cr2O3-rGO Composites

2016 ◽  
Vol 721 ◽  
pp. 419-424
Author(s):  
M. Erkin Cura ◽  
Vivek Kumar Singh ◽  
Panu Viitaharju ◽  
Joonas Lehtonen ◽  
Simo Pekka Hannula
Keyword(s):  
Fracture Toughness ◽  
Graphene Oxide ◽  
Electric Current ◽  
Chromium Oxide ◽  
High Hardness ◽  
High Wear Resistance ◽  
Carbide Formation ◽  
Indentation Fracture ◽  
Pulsed Electric Current ◽  
Indentation Fracture Toughness

Chromium oxide is a promising material for applications where excellent corrosion resistance, high hardness, and high wear resistance are needed. However, its use is limited because of low fracture toughness. Improvement of fracture toughness of chromium oxide while maintaining its afore mentioned key properties is therefore of high interest. In this communication we study the possibility of increasing the toughness of pulsed electric current sintered (PECS) chromium oxide by the addition of graphene oxide (GO). The indentation fracture toughness was improved markedly with the addition of graphene oxide. Materials prepared by direct chemical homogenization had better fracture toughness. In composites with 10 vol.% GO piling of thin graphene oxide layers resulted in the formation of graphite layers between Cr2O3 and in carbide formation, which were observed to be the main reasons for the degradation of the mechanical properties. The distribution of graphene oxide was more homogeneous, when the GO amount was 0.1 vol.% and the formation of graphitic layers were avoided due to lesser amount of GO as well as ultrasonic treatment following the ball milling.

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.

Determining indentation fracture toughness of ceramics by finite element method using virtual crack closure technique

2018 ◽  
Vol 197 ◽  
pp. 151-159 ◽  
Author(s):  
Liang Sun ◽  
Dejun Ma ◽  
Lizhi Wang ◽  
Xinzheng Shi ◽  
Jialiang Wang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Fracture Toughness ◽  
Finite Element ◽  
Crack Closure ◽  
Virtual Crack Closure Technique ◽  
Indentation Fracture ◽  
Closure Technique ◽  
Indentation Fracture Toughness ◽  
Element Method

Indentation fracture toughness and dynamic young's modulus of ceramic biomaterials

1988 ◽  
Vol 105-106 ◽  
pp. 207-213 ◽  
Author(s):  
D.W. Jones ◽  
A.S. Rizkalla ◽  
E.J. Sutow ◽  
H.W. King
Keyword(s):  
Fracture Toughness ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Indentation Fracture ◽  
Dynamic Young’S Modulus ◽  
Indentation Fracture Toughness ◽  
Dynamic Young's Modulus
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