scholarly journals Preparation Technology of Ultra-Fine Tungsten Carbide Powders: An Overview

2020 ◽  
Vol 7 ◽  
Author(s):  
Yu-Cheng Wu ◽  
Yu Yang ◽  
Xiao-Yue Tan ◽  
Laima Luo ◽  
Xiang Zan ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Preparation Technology ◽  
Fine Tungsten

Ultra-Fine Tungsten Carbide Powder Prepared by a Nitridation-Carburization Method

2010 ◽  
Vol 93 (11) ◽  
pp. 3565-3568 ◽  
Author(s):  
Shi-Kuan Sun ◽  
Yan-Mei Kan ◽  
Guo-Jun Zhang ◽  
Pei-Ling Wang
Keyword(s):  
Tungsten Carbide ◽  
Carbide Powder ◽  
Tungsten Carbide Powder ◽  
Fine Tungsten

Fabrication of Micro Components to Silicon Wafer Using EDM Process

2006 ◽  
Vol 505-507 ◽  
pp. 217-222 ◽  
Author(s):  
Feng Tsai Weng ◽  
Chen Siang Hsu ◽  
Wen Feng Lin
Keyword(s):  
Tungsten Carbide ◽  
Silicon Wafer ◽  
Electrode Array ◽  
Copper Electrode ◽  
Silicon Wafers ◽  
Tool Electrode ◽  
Micro Holes ◽  
Micro Hole ◽  
Fine Tungsten ◽  
Edm Process

In this paper, the machining possibilities of silicon wafers by the EDM process are described. Micro components of silicon wafer were processed by EDM process. A fine tungsten carbide rod was machined as tool electrode for EDM process. Performance was investigated utilizing serious experiments. Micro hole was process with the fine electrode using EDM drilling. Micro slots were also processed on the surface of a silicon plate by a copper section electrode. The surface roughness of the silicon wafers in the EDM process was investigated. Array-micro-hole was machined by a tungsten carbide multi-electrode. Array micro holes on the coaxial circle were processed by a graphite-copper electrode of Dia.0.45mm. Batch production technology for economical EDM machining of micro holes were proposed.

Rapid sintering process and mechanical properties of binderless ultra fine tungsten carbide

2006 ◽  
Vol 435-436 ◽  
pp. 717-724 ◽  
Author(s):  
Hwan-Cheol Kim ◽  
Jin-Kook Yoon ◽  
Jung-Mann Doh ◽  
In-Yong Ko ◽  
In-Jin Shon
Keyword(s):  
Mechanical Properties ◽  
Tungsten Carbide ◽  
Sintering Process ◽  
Rapid Sintering ◽  
Fine Tungsten

Technology for Producing Fine Tungsten Carbide Powders

2021 ◽  
Vol 1037 ◽  
pp. 111-118
Author(s):  
Konstantin M. Kolmakov ◽  
Alexander E. Zverovshchikov
Keyword(s):  
Tungsten Carbide ◽  
Fine Particles ◽  
Graphite Electrode ◽  
Angular Speed ◽  
Electric Arc ◽  
Tungsten Electrode ◽  
Centrifugal Atomization ◽  
Intense Evaporation ◽  
Calculated Ratio ◽  
Fine Tungsten

The article shows the advantage of electric arc synthesis and subsequent centrifugal spraying of tungsten carbide to obtain a high-quality highly dispersed powder. A tungsten electrode (anode) is fed to the surface of a rotating graphite electrode (cathode) until an electric arc occurs between the electrodes, and the cathode is made in the form of a ring. The angular speed of rotation of the annular graphite electrode is set in accordance with the calculated ratio, which provides fine-dispersed centrifugal atomization of the molten product particles. To prevent intense evaporation of tungsten and the formation of an excessive amount of fine particles, the power of the electric arc for melting the anode is limited to a set value.As a result, the uniformity of the powder increases and the dispersion of the particles of the main fraction decreases.

Graphene Supported Tungsten Carbide as Catalyst for Electrochemical Reduction of CO2

2019 ◽  
Author(s):  
Sahithi Ananthaneni ◽  
Rees Rankin
Keyword(s):  
Tungsten Carbide ◽  
Electrochemical Reduction ◽  
Low Cost ◽  
Co2 Reduction ◽  
Platinum Group Metal ◽  
Reduction Reaction ◽  
Metal Carbides ◽  
Depth Study ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction

<div>Electrochemical reduction of CO2 to useful chemical and fuels in an energy efficient way is currently an expensive and inefficient process. Recently, low-cost transition metal-carbides (TMCs) are proven to exhibit similar electronic structure similarities to Platinum-Group-Metal (PGM) catalysts and hence can be good substitutes for some important reduction reactions. In this work, we test graphenesupported WC (Tungsten Carbide) nanocluster as an electrocatalyst for the CO2 reduction reaction. Specifically, we perform DFT studies to understand various possible reaction mechanisms and determine the lowest thermodynamic energy landscape of CO2 reduction to various products such as CO, HCOOH, CH3OH, and CH4. This in-depth study of reaction energetics could lead to improvements and develop more efficient electrocatalysts for CO2 reduction.<br></div>

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