The Effect of Fe3Al on the Microstructure and Mechanical Properties of β–Sialon Ceramic

2012 ◽  
Vol 487 ◽  
pp. 775-780
Author(s):  
Xiao Lin Sun ◽  
Kang Ning Sun ◽  
Ming Du ◽  
Ai Min Li
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Low Temperature ◽  
Mechanical Alloying ◽  
Hot Pressing ◽  
Matrix Composites ◽  
Sialon Ceramic ◽  
Microstructure And Mechanical Properties

Sialon matrix composites were prepared from a reaction mixture of Si3N4, Al2O3 and Y2O3 powders and reinforced with Fe3Al obtained by mechanical alloying, which also can assist sintering at a low temperature. The specimens were sintered by two–step hot pressing and then characterized for phase composition, microstructure and mechanical properties. The effect of the Fe3Al variables on the mechanical properties was studied.

Microstructure and Mechanical Properties of Copper, Nickel and Ternary Alloys Cu-Ni-Zr Obtained by Mechanical Alloying and Hot Pressing

MRS Advances ◽  
2017 ◽  
Vol 2 (50) ◽  
pp. 2831-2836 ◽  
Author(s):  
C. Martínez ◽  
F. Briones ◽  
P. Rojas ◽  
S. Ordoñez ◽  
C. Aguilar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Ternary Alloy ◽  
Hot Pressing ◽  
Binary Alloys ◽  
Crystal Defects ◽  
Ternary Alloys ◽  
Compression Tests ◽  
Microstructure And Mechanical Properties ◽  
Pure Cu

ABSTRACTElemental powders of Cu and Ni, binary alloys (Cu-Ni and Cu-Zr) and ternary alloy (Cu-Ni-Zr) obtained by mechanical alloying and uniaxial compaction hot microstructure and mechanical properties were investigated. The alloys studied were: pure Cu, pure Ni, binary alloys (Cu-Ni; Cu-Zr) and ternary alloys (Cu-Ni-Zr) under the same mechanical milling and hot pressing conditions. The samples were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM); the mechanical properties were studied by compression tests and hardness in Vickers scale (HV0.5) on polished surfaces at room temperature. According to XRD results, hot pressing process crystallite size increase and microstrain decreases in the compact samples due to the release of crystalline defects. The compacted samples have porosity of approximately 20%. The milling powder samples have a higher hardness than the unmilled samples, this because during milling crystal defects are incorporated together with the microstructural refinement. Ternary alloy is the one with the highest hardness of all systems studied, reaching 689 HV0.5. In compression tests determined a strain 5 %, Zr-containing samples become more fragile presenting the lowest values of compressive strength. In contrast, samples of Ni and Cu-Ni binary alloy are more resistant to compression.

scholarly journals Microstructure and mechanical properties of FeAl intermetallics prepared by mechanical alloying and hot-pressing

2009 ◽  
Vol 14 (3) ◽  
pp. 300-306 ◽  
Author(s):  
Haixia Song ◽  
Yunxin Wu ◽  
Chuan'an Tang ◽  
Shuai Yuan ◽  
Qianming Gong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Hot Pressing ◽  
Microstructure And Mechanical Properties
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