Dense powder from beneficiated dolomites for producing tar-bonded dolomite refractories

Refractories ◽  
1972 ◽  
Vol 13 (11-12) ◽  
pp. 701-705
Author(s):  
V. A. Bron ◽  
E. F. Kosolapov ◽  
M. V. Medyakova ◽  
E. K. Kozhevnikov ◽  
N. I. Baranovskii
Keyword(s):  
Dense Powder

Dense powder materials for nicke-metal hydride batteries

2002 ◽  
Vol 57 (11) ◽  
pp. 37
Keyword(s):  
Metal Hydride ◽  
Powder Materials ◽  
Dense Powder

Dense powder steels for small ball bearing rings

2003 ◽  
Vol 58 (1) ◽  
pp. 39
Keyword(s):  
Ball Bearing ◽  
Small Ball ◽  
Bearing Rings ◽  
Powder Steels ◽  
Dense Powder

Microstructure and Mechanical Properties of Powder Metallurgy Ti-22Al-24Nb-0.5Mo Alloys Joints with Electron Beam Welding

2016 ◽  
Vol 849 ◽  
pp. 321-326
Author(s):  
Jie Wu ◽  
Lei Xu ◽  
Rui Peng Guo ◽  
Zheng Guan Lu ◽  
Yu You Cui ◽  
...  
Keyword(s):  
Electron Beam ◽  
Powder Metallurgy ◽  
Electron Beam Welding ◽  
Base Alloy ◽  
Hot Isostatic Pressing ◽  
Gas Atomization ◽  
Alloyed Powder ◽  
Uniform Microstructure ◽  
Joint Quality ◽  
Dense Powder

In this work, a Ti2AlNb based intermetallic alloy with the composition of Ti–22Al–24Nb–0.5Mo (at. %) pre-alloyed powder was firstly produced by gas atomization, and then fully dense powder metallurgy (PM) Ti2AlNb alloy was prepared by a hot isostatic pressing (HIPing) procedure. The HIPed alloy shows uniform microstructure with low number of porosities. In order to broaden the application field of PM Ti2AlNb alloys, electron beam welding (EBW) was proposed to join the intermetallics. The joint quality, microstructure and microhardness of PM Ti2AlNb alloy processed by EBW were characterized, and the results showed that the both base alloy and EBW joints have high metallurgy quality.

Industrial production of dense powder from Satkinsk magnesite beneficiated by flotation

Refractories ◽  
1972 ◽  
Vol 13 (1-2) ◽  
pp. 69-74
Author(s):  
N. F. Bugaev ◽  
K. V. Simonov ◽  
A. G. Luzin
Keyword(s):  
Industrial Production ◽  
Dense Powder

Cohesive, multicomponent, dense powder flow characterization by NIR

2007 ◽  
Vol 336 (2) ◽  
pp. 292-301 ◽  
Author(s):  
C. Benedetti ◽  
N. Abatzoglou ◽  
J.-S. Simard ◽  
L. McDermott ◽  
G. Léonard ◽  
...  
Keyword(s):  
Powder Flow ◽  
Flow Characterization ◽  
Dense Powder

scholarly journals Effects of reducing the reactor diameter on the fluidization of a very dense powder

2015 ◽  
Vol 277 ◽  
pp. 268-274 ◽  
Author(s):  
F. Vanni ◽  
B. Caussat ◽  
C. Ablitzer ◽  
M. Brothier
Keyword(s):  
Reactor Diameter ◽  
Dense Powder

Surface plasmon induced enhancement in selective laser melting processes

2019 ◽  
Vol 25 (6) ◽  
pp. 1135-1143
Author(s):  
Raj K. Vinnakota ◽  
Dentcho A. Genov
Keyword(s):  
Metal Powder ◽  
Surface Plasmon ◽  
Thermal Effects ◽  
Thermal Processes ◽  
Laser Melting ◽  
Content Type ◽  
Electromagnetic Interactions ◽  
Full Wave ◽  
First Time ◽  
Dense Powder

Purpose Selective laser melting (SLM) is an advanced rapid prototyping or additive manufacturing technology that uses high power density laser to fabricate metal/alloy components with minimal geometric constraints. The SLM process is multi-physics in nature and its study requires development of complex simulation tools. The purpose of this paper is to study – for the first time, to the best of the authors’ knowledge – the electromagnetic wave interactions and thermal processes in SLM based dense powder beds under the full-wave formalism and identify prospective metal powder bed particle distributions that can substantially improve the absorption rate, SLM volumetric deposition rate and thereby the overall build time. Design/methodology/approach We present a self-consistent thermo-optical model of the laser-matter interactions pertaining to SLM. The complex electromagnetic interactions and thermal effects in the dense metal powder beds are investigated by means of full-wave finite difference simulations. The model allows for accurate simulations of the excitation of gap, bulk and surface electromagnetic resonance modes, the energy transport across the particles, time dependent local permittivity variations under the incident laser intensity, and the thermal effects (joule heating) due to electromagnetic energy dissipation. Findings Localized gap and surface plasmon polariton resonance effects are identified as possible mechanisms toward improved absorption in small and medium size titanium powder beds. Furthermore, the observed near homogeneous temperature distributions across the metal powders indicates fast thermalization processes and allows for development of simple analytical models to describe the dynamics of the SLM process. Originality/value To the best of the authors’ knowledge, for the first time the electromagnetic interactions and thermal processes with dense powder beds pertaining to SLM processes are investigated under full-wave formalism. Explicit description is provided for important SLM process parameters such as critical laser power density, saturation temperature and time to melt. Specific guidelines are presented for improved energy efficiency and optimization of the SLM process deposition rates.

Obtaining dense powder from Satkinsk magnesite beneficiated by flotation

Refractories ◽  
1970 ◽  
Vol 11 (7-8) ◽  
pp. 401-404
Author(s):  
V. A. Bron ◽  
M. I. Diesperova ◽  
I. A. Stepanova ◽  
A. P. Kukuruzov ◽  
N. F. Bugaev ◽  
...  
Keyword(s):  
Dense Powder

Modeling and MIMO controller design of dense powder fluidized beds

1996 ◽  
Vol 35 (2) ◽  
pp. 105-119
Author(s):  
D.E. Ventzas
Keyword(s):  
Fluidized Beds ◽  
Controller Design ◽  
Dense Powder

scholarly journals Effect of Powder Size on Microstructure and Mechanical Properties of 2A12Al Compacts Fabricated by Hot Isostatic Pressing

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Xina Huang ◽  
Lihui Lang ◽  
Gang Wang ◽  
Sergei Alexandrov
Keyword(s):  
Mechanical Properties ◽  
Alloy Powder ◽  
Powder Compact ◽  
Hot Isostatic Pressing ◽  
Powder Size ◽  
Microstructure And Mechanical Properties ◽  
Powder Particles ◽  
Aluminum Alloy Powder ◽  
Precipitated Phases ◽  
Dense Powder

This paper studied the effects of powder size on densification, microstructure, and mechanical properties of the hot isostatic-pressed 2A12 aluminum alloy powder compact. The results show that the near-fully dense powder compact can be successfully achieved and the smaller the powder is, the higher the relative density is. In addition, as the powder size decreases, the precipitated phases in the powder compact change from continuously point-like distribution at the junctions among powder particles to the concentrated distribution at the three-way intersections. Compared with the large powder, the tensile strength, yield strength, and elongation of the compact with the small powder were improved by 14%, 30.8%, and 48.6%, respectively.

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