Structural-Phase State and Microhardness of a Precursor from Equiatomic W-Ta-Mo-Nb-Zr-Cr-Ti Powder Mixture after High-Energy Mechanical Activation

2021 ◽  
Vol 24 (6) ◽  
pp. 707-715
Author(s):  
I. A. Ditenberg ◽  
I. V. Smirnov ◽  
D. A. Osipov ◽  
M. A. Korchagin
Keyword(s):  
Mechanical Activation ◽  
Powder Mixture ◽  
Phase State ◽  
Structural Phase ◽  
High Energy ◽  
Structural Phase State ◽  
Ti Powder

Influence of ball milling duration on the morphology, features of the structural-phase state and microhardness of 3Ni-Al powder mixture

2021 ◽  
Author(s):  
Ivan A. Ditenberg ◽  
Denis A. Osipov ◽  
Michail A. Korchagin ◽  
Ivan V. Smirnov ◽  
Konstantin V. Grinyaev ◽  
...  
Keyword(s):  
Ball Milling ◽  
Powder Mixture ◽  
Phase State ◽  
Structural Phase ◽  
Structural Phase State ◽  
Milling Duration ◽  
Al Powder

Effect of Mechanical Activation and Gamma-Irradiation on Structural-Phase State of Ti-Al-C Powder Reagents

2021 ◽  
Vol 410 ◽  
pp. 674-679
Author(s):  
Aleksei V. Sobachkin ◽  
Alexander A. Sitnikov ◽  
Andrey Yu. Myasnikov
Keyword(s):  
Gamma Irradiation ◽  
Mechanical Activation ◽  
Phase State ◽  
Structural Parameters ◽  
Structural Phase ◽  
Crystal Lattices ◽  
Structural Phase State ◽  
Diffuse Background ◽  
Ratio Of Components ◽  
Accumulated Dose

The influence of mechanical activation and gamma-irradiation on the structural-phase state of Ti-Al-C powder reagents was studied. The following compositions were used for research: 1) 78% Ti + 14% Al + 8% C; 2) 80% Ti + 12% Al + 8% C; 3) 81% Ti + 10% Al + 9% C. Mechanical activation of these compositions leads to an increase in the diffuse background, a decrease in the intensity of diffraction reflections of mixture components and a broadening of peaks, as well as micro-deformations. Depending on the ratio of components, the structural parameters can either increase in comparison with the initial ones, or decrease. The effect of gamma radiation with a dose rate of 1 Gy/s and accumulated dose of 3·104 Gy on the mechanocomposites of the Ti-Al-C system causes unsystematic change in crystal lattices of elements, which can be explained by radiation-stimulated diffusion. Gamma-irradiation also reduces micro-deformations that occur after mechanical activation, while crystallites of the components remain nanoscale.

Structural-Phase State and Strength Properties of Pressure-Synthesized Ni3Al Intermetallic Compound

2017 ◽  
Vol 906 ◽  
pp. 95-100 ◽  
Author(s):  
V.E. Ovcharenko ◽  
E.N. Boyangin ◽  
A.P. Pshenichnikov ◽  
T.A. Krilova
Keyword(s):  
Grain Size ◽  
Intermetallic Compound ◽  
Powder Mixture ◽  
Delay Time ◽  
Phase State ◽  
Structural Phase ◽  
Strength Properties ◽  
Synthesis Product ◽  
Structural Phase State ◽  
High Temperature Synthesis

The article studies dependences of grain size in Ni3Al intermetallic compound synthesized under pressure in 3Ni+Al powder mixture in conditions of bulk exothermal reaction upon pre-pressure acting on the powder mixture and upon a delay time of applying pressure to a high-temperature synthesis product. It is proved that an increase in the pre-pressure on the parent powder mixture reduces the grain size, and an increase in the delay time increases the grain size in the synthesized intermetallic compound. Reducing the grain size from 10 to 1.75μm increases the strength of the intermetallic compound under pressure from 336 to 482 MPa (1.4 times).

Influence of composition on the structural-phase state, electrophysical and magnetotransport properties of alloy thin films based on Co and Cu

Vacuum ◽  
2021 ◽  
Vol 187 ◽  
pp. 110141
Author(s):  
I.O. Shpetnyi ◽  
I.Yu Protsenko ◽  
S.I. Vorobiov ◽  
V.I. Grebinaha ◽  
L. Satrapinskyy ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase State ◽  
Structural Phase ◽  
Structural Phase State
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