Effect of copper addition on microstructures and mechanical properties of in situ TiCp/Fe composites

2011 ◽  
Vol 32 (6) ◽  
pp. 3560-3565 ◽  
Author(s):  
X.H. Zhang ◽  
M.H. Yu ◽  
H.Q. Tang ◽  
G.C. Su
Keyword(s):  
Mechanical Properties ◽  
Copper Addition ◽  
Microstructures And Mechanical Properties ◽  
Effect Of Copper

scholarly journals Fabrication and mechanical properties of Al2O3/TiAl in situ composites doped with Nb2O5

2015 ◽  
Vol 47 (3) ◽  
pp. 311-317 ◽  
Author(s):  
F. Wang ◽  
N. Fan ◽  
J. Zhu ◽  
H. Jiang
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Flexural Strength ◽  
Hot Press ◽  
Dispersion Method ◽  
Powder Mixtures ◽  
In Situ Composites ◽  
Microstructures And Mechanical Properties

Al2O3/TiAl composites were successfully fabricated from powder mixtures of Ti, Al, TiO2, Cr2O3 and Nb2O5 by a hot-press-assisted exothermic dispersion method. The effect of the Cr2O3 and Nb2O5 addition on the microstructures and mechanical properties of Al2O3/TiAl composites was characterized. The results showed that the specimens are mainly composed of TiAl, Ti3Al, Al2O3, NbAl3 and Cr2Al. The Vicker-hardness and density of Al2O3/TiAl composites increase gradually with the increase of Nb2O5 content. When the Nb2O5 content was 6.54 wt %, the flexural strength and fracture toughness of the composites have a maximum values of 789.79 MPa and 9.69 MPa?m1/2, respectively. The improvement of mechanical properties is discussed in detail.

Effect of Copper Addition on Mechanical Properties of Nanostructured Pb1-xCuxTe Thermoelectric Alloy Systems by Nanoindentation

2017 ◽  
Vol 735 ◽  
pp. 205-209
Author(s):  
Mohamed Abd El Naser Mansour ◽  
Ahmed Abdel-Moneim ◽  
Koichi Nakamura
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Hot Isostatic Pressing ◽  
Design Parameters ◽  
Copper Addition ◽  
Thermoelectric Systems ◽  
Ball Milling Technique ◽  
Effect Of Copper ◽  
Alloy Systems

The mechanical properties of sintered nanostructured Pb1-xCuxTe (0 ≤ x ≤ 0.2) alloy systems were investigated using nanoindentation technique. The powder precursors of the designed systems were prepared by ball milling technique and sintered by hot isostatic pressing. Cu acts as a dopant in these alloy systems, and an increase in its concentration, up to x = 0.1, leads to a more dense and refined nanostructure along with enhancements in both hardness and Young’s modulus. The Cu addition caused an apparent embrittlement in the materials, and spalling of the materials was recognized when x exceeded 0.15. These results imply that design parameters of complex mechanical environments under thermal shocks and vibrations cannot be determined only in terms of hardness and Young’s modulus of thermoelectric systems like Pb1-xCuxTe alloys.

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