The effect of the amount of process control agent on the properties of Cu25W composite powder

Abstract

This study is based upon the optimization of production parameters of Cu25W electrical contact material. Commercial elemental copper (Cu) and tungsten (W) powders were synthesized to produce Cu25W composite powder by mechanical alloying technique at various amounts of stearic acid via using a planetary type ball mill. The effect of amount of stearic acid on production of Cu25W composite powder was evaluated. In order to achieve true alloying among powder particles, it is necessary to establish a balance between cold welding and fracturing. Hence, different types of process control agents (PCA) were used to reduce excessive cold welding. Here, the effect of various amounts of stearic acid, namely 0, 0.5, 1, 2 and 3 wt.% on morphology and some properties of Cu25W composite powder were studied. The microstructural evolution of the milled powders was characterized by using scanning electron microscopy. The test results showed that the morphology and particle size distribution of the milled powders were changed considerably depending upon the variable amount of PCA. In addition, holding the same milling duration, different microhardness values were obtained for various amounts of PCA.

Producing Metal Powder from Machining Chips Using Ball Milling Process: A Review

“…A ball mill is additionally utilized to grind and combine materials, commonly with spherical or cylindricalshaped grinding media such as balls or rods [86]. Numerous researchers have effectively Mechanical alloying as a method of solid-state particle processing that involves mechanical welding, breaking, and rewelding particle powders repeatedly in a high-energy ball mill [53,62,63]. It is among the most effective nanostructures top-down preparation procedures for nanocrystalline [64], nanoparticles [65], and nanocomposite materials [66].…”

“…The current study investigates the type of ratio for ball mill jars listed in Table 3 and [ 63 , 80 , 168 , 181 , 183 ]. Different ball-to-jar ratios can affect the milling kinetics, the size, and distribution of the milled particles, and ultimately the mechanical properties of the resulting materials [ 103 , 105 , 114 , 141 , 156 , 163 , 184 , 185 , 186 ].…”

“…Mechanical alloying as a method of solid-state particle processing that involves mechanical welding, breaking, and rewelding particle powders repeatedly in a high-energy ball mill [ 53 , 62 , 63 ]. It is among the most effective nanostructures top-down preparation procedures for nanocrystalline [ 64 ], nanoparticles [ 65 ], and nanocomposite materials [ 66 ].…”

“…However, further research is necessary to fully assess the compressive str thermal conductivity, and overall effectiveness and economic viability of these m Five (5) studies related to the use of ball milling for composite and nanoparticle synthesis were summarized. Biyik and Aydin [63] examined the impact of the amount of process control agent (PCA) on the properties of Cu25W composite powder, while Guaglianoni et al [80] investigated the production and characterization of WC-12 wt% Co nanocomposites through high-energy ball milling. Petrovic et al [183] presented an optimization study of the nanoparticle ball milling machine settings using the response surface method (RSM), while Vasamsetti et al [181] examined the manufacture of nanoparticles using a planetary ball mill machine and the adjustment of milling settings for enhanced particle size reduction.…”

Investigation of the Effect of Different Current Loads on the Arc-Erosion Performance of Electrical Contacts

“…One of the most important performance tests of electrical contact materials is the arc-erosion test. Many studies have been conducted using arc-erosion testing equipment on the manufacture and evaluation of various contact materials, including some composites, to investigate electrical performance [4][5][6][7][8][9][10][11]. The main purpose of these studies is to predict the lifespan of electrical contacts, which can assist in eliminating or minimizing contact failures.…”