High-Temperature Gas Extrusion of a Reactive Ni + Al Powder Mixture

2019 ◽  
Vol 64 (12) ◽  
pp. 446-448
Author(s):  
F. F. Galiev ◽  
I. V. Saikov ◽  
V. D. Berbentsev ◽  
A. V. Guluytin ◽  
V. I. Bugakov ◽  
...  
Keyword(s):  
High Temperature ◽  
Powder Mixture ◽  
Al Powder ◽  
High Temperature Gas

scholarly journals Al-Ti-B4C materials obtained by high-temperature synthesis and used as a master-alloy for aluminum

2018 ◽  
Vol 243 ◽  
pp. 00010 ◽  
Author(s):  
Ilya Zhukov ◽  
Vladimir Promakhov ◽  
Yana Dubkova ◽  
Alexey Matveev ◽  
Mansur Ziatdinov ◽  
...  
Keyword(s):  
High Temperature ◽  
Burning Rate ◽  
Powder Mixture ◽  
Pure Aluminum ◽  
Al Alloy ◽  
Initial Powder ◽  
Temperature Synthesis ◽  
Al Content ◽  
High Temperature Synthesis ◽  
Al Powder

The paper presents microstructure, composition, and burning rate of Al alloy produced by high-temperature synthesis (SHS) from powder mixture Al-Ti-B4C with different concentration of Al powder. It has been established that the phase composition of materials obtained at gas-free combustion includes TiB2, Al, and TiC. It is shown that Al content growth powder in initial Al-Ti- B4C mixture from 7.5 to 40 wt.% reduces the burning rate of the powder from 9*10-3 to 1.8*10-3 m/s. For the system consisting of 60 wt.% of (Ti + B4C) and 40 wt.% of Al there is the increase in the porosity of the compacted initial powder mixture from 30 to 51 and reduction in the burning rate from 1.8 * 10-3 to 1 * 10-3 m/s. The introduction of 0.2 wt.% of the obtained SHS materials into the melt of pure aluminum causes reduction of the grain size of the resulting alloy from 1200 to 410 μm.

scholarly journals High temperature gas extrusion of reactive powder mixture Ni + AL

2019 ◽  
Vol 489 (4) ◽  
pp. 358-361
Author(s):  
F. F. Galiev ◽  
I. V. Saikov ◽  
V. D. Berbentcev ◽  
A. V. Guliyutin ◽  
V. I. Bugakov ◽  
...  
Keyword(s):  
High Temperature ◽  
Powder Mixture ◽  
Model System ◽  
Steel Shell ◽  
Powder Mixtures ◽  
Reactive Powder ◽  
First Time ◽  
High Temperature Gas

The results of the study of intermetallic rods in a steel shell obtained by high-temperature gas extrusion for the first time used for reactive powder mixtures are presented. Tests were conducted on the basis of model system Ni-Al.

Structure Formation during High-Temperature Synthesis in an Activated Ti + Al Powder Mixture

2019 ◽  
Vol 55 (11) ◽  
pp. 1097-1103
Author(s):  
V. Yu. Filimonov ◽  
M. V. Loginova ◽  
A. V. Sobachkin ◽  
S. G. Ivanov ◽  
A. A. Sitnikov ◽  
...  
Keyword(s):  
High Temperature ◽  
Structure Formation ◽  
Powder Mixture ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Al Powder

An Environmental Wet Cell For High Voltage Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 18-19
Author(s):  
N.J. Tighe ◽  
H.M. Flower ◽  
P.R. Swann
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Image Quality ◽  
Inelastic Scattering ◽  
High Voltage ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
Environmental Cell ◽  
Water Saturated ◽  
High Temperature Gas

A differentially pumped environmental cell has been developed for use in the AEI EM7 million volt microscope. In the initial version the column of gas traversed by the beam was 5.5mm. This permited inclusion of a tilting hot stage in the cell for investigating high temperature gas-specimen reactions. In order to examine specimens in the wet state it was found that a pressure of approximately 400 torr of water saturated helium was needed around the specimen to prevent dehydration. Inelastic scattering by the water resulted in a sharp loss of image quality. Therefore a modified cell with an ‘airgap’ of only 1.5mm has been constructed. The shorter electron path through the gas permits examination of specimens at the necessary pressure of moist helium; the specimen can still be tilted about the side entry rod axis by ±7°C to obtain stereopairs.

DISPERSED PHASE VELOCITY IN A HIGH-TEMPERATURE GAS FLOW

2019 ◽  
Vol 23 (4) ◽  
pp. 319-328
Author(s):  
Dmitry V. Nesterovich ◽  
Oleg G. Penyazkov ◽  
Yu. A. Stankevich ◽  
M. S. Tretyak ◽  
Vladimir V. Chuprasov ◽  
...  
Keyword(s):  
High Temperature ◽  
Phase Velocity ◽  
Gas Flow ◽  
Dispersed Phase ◽  
High Temperature Gas
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