Results 31 to 40 of about 569,570 (305)

Effects of Gravity and Non-Perpendicularity during Powder-Fed Directed Energy Deposition of Ni-Based Alloy 718 through Two Types of Coaxial Nozzle [PDF]

, 2020
The consequences of gravity and the nozzle inclination angle in the powder-fed Directed Energy Deposition (DED) process were examined in this study.
Alberdi, Amaia, Lamikiz, Aitzol, Ortiz, Mikel, Ramiro-Castro, Pedro   +3 more
core   +2 more sources

Shape Control of Silica Powder Formation

Journal of Materials Science and Chemical Engineering, 2019
The purpose of the present research is the different morphologies production of crystalline and amorphous-silica powder. It’s a basic material for many pharmaceutical and environmental applications as well. And, it’s produced using the combination of the alkali chemical etching process and the ultra-sonication technique.
Marwa Nabil, Hussien A. Motaweh
openaire   +2 more sources

Data showing the effects of disc milling time on the composition and morphological transformation of (α+β) titanium alloy (Ti–6Al–2Sn–2Mo–2Cr–2Zr-0.25Si) grade

Data in Brief, 2019
In powder metallurgy, dry mechanical milling process is an effective technique employed in the reduction of solid materials into the desired size in the fabrication of materials or components from metal powders for various applications.
Okwudili Simeon Ogbonna, Stephen A. Akinlabi, Nkosinathi Madushele   +2 more
doaj   +1 more source

The demagnetization factor for randomly packed spheroidal particles

, 2019
We investigate if the demagnetization factor for a randomly packed powder of magnetic spheroidal particles depend on the shape of the spheroidal particles and what the internal variation in magnetization is within such a powder.
Bjørk, R., Zhou, Z.
core   +1 more source

Computer Generation of Metal Components by Simultaneous Deposition of Mould, Cores and Part [PDF]

, 2006
A new solid freeforming method based on co-delivery of mould powder materials and part powder materials using vibration-controlled, dry powder valves is presented in this paper.
Evans, Julian R. G., Mohebi, Masoud M., Yang, Shoufeng   +2 more
core   +1 more source

Effects of Surface Size and Shape of Evaporation Area on SiC Single-Crystal Growth Using the PVT Method

Crystals
Silicon carbide (SiC) polycrystalline powder. As the raw material for SiC single-crystal growth through the physical vapor transport (PVT) method, its surface size and shape have a great influence on growth of crystal.
Yu Zhang, Xin Wen, Nuofu Chen, Fang Zhang, Jikun Chen, Wenrui Hu   +5 more
doaj   +1 more source

The Influence of Particle Shape, Powder Flowability, and Powder Layer Density on Part Density in Laser Powder Bed Fusion

Metals, 2021
The particle shape influences the part properties in laser powder bed fusion, and powder flowability and powder layer density (PLD) are considered the link between the powder and part properties.
Lukas Haferkamp, Livia Haudenschild, Adriaan Spierings, Konrad Wegener, Kirstin Riener, Stefan Ziegelmeier, Gerhard J. Leichtfried   +6 more
doaj   +1 more source

A study of direct forging process for powder superalloys [PDF]

, 2014
Powder metallurgy (PM) processing of nickel-based superalloys has been used for a wide range of near net-shape fine grained products. In this paper a novel forming process, i.e. direct forging of unconsolidated powder superalloys is proposed.
Bai, Q, Dean, TA, Jiang, J, Lin, J, Tian, G, Zou, J   +5 more
core   +2 more sources

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Peculiarities of Silicon Nitride and Carbide Powder Synthesis

Наука и техника, 2003
The paper shows that temperature, burning rate and content of main substance bear a relationship to nitrogen pressure in a reactor, charge density, blank diameter, specific surface of initial silicon powder at synthesis of Si3N4-SiC powder composition ...
V. N. Kovalevsky, A. V. Kovalevskaya, V. V. Pytko   +2 more
doaj   +1 more source