The influence of ball milling conditions on the powder …
In stages 2 and 3, without adding a process control agent (PCA), the softer original particles, especially the Cu, ... In materials processing research, the ball milling process constitutes a pivotal step in preparing powder materials and augmenting material properties. The milling time, milling speed, and BPR are three adjustable parameters in ...
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Effects of interfacial interactions between metal and process control
Fe-Si-B-P-Cu nanocrystalline alloy were treated with ball-mill using a lubricant as a process control agent (PCA). The resulting alloy powder is a strong candidate material for soft magnetic composites. Two ball milling methods (continuous and interval) were employed to control the interactions betw …
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The effect of the amount of process control agent on …
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.
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(PDF) Effect of Process Control Agents (PCAs) on …
The effect of various factors, such as process control agent (PCA), speed of rotation of vial and ball-to-powder weight ratio, on process were studied and the best condition to synthesis the alloy ...
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An investigation of the use of stearic acid as a process control agent
The effects of stearic acid as a process control agent (PCA) on the synthesis of WC–MgO by mechanical alloying have been investigated. 0–2.0wt% of stearic acid is added into the mixture of WO3 ...
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Effect of organic liquid process control agents on properties of ball
Despite widespread use of liquid process control agents (PCA) during material processing via high-energy ball milling, their effect on the properties of the milled powders has not been quantified ...
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Advanced Powder Technology
Despite widespread use of liquid process control agents (PCA) during material processing via high-energy ball milling, their effect on the properties of the milled powders has not been...
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Effect of process control agent on the structural and …
The effect of Hexane as process control agent (PCA) on the structural, magnetic, morphological and thermal properties of the products was investigated. ... Fabrication of titanium carbide nano-powders by a very high speed planetary ball milling with a help of process control agents. Powder Technology, Volume 274, 2015, pp. 393-401.
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Effect of organic liquid process control agents on properties of ball
Despite widespread use of liquid process control agents (PCA) during material processing via high-energy ball milling, their effect on the properties of the milled powders has not been quantified or understood. It is generally accepted that PCA affect the energy transfer between milling tools and powders being milled; however, which PCA ...
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Effects of Process Control Agent Amount, Milling Time, and …
This study was conducted to investigate the characteristics of the AlCrCuFeNi high-entropy alloy (HEA) synthesized through mechanical alloying (MA). In addition, effects of Process Control Agent (PCA) amount and milling time were investigated using X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray …
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Wet ball milling of niobium by using ethanol, determination …
In the wet milling technique, process control agents (lubricant or surfactant) such as: ethanol, stearic acid, methanol, hexane etc., are added to the powder mixture during milling to reduce the ...
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Effect of Ball Milling Parameters on the Refinement of …
The high-energy ball milling method was adopted to explore the influence of ball milling parameters, such as milling speed and additive amounts of process control agent (PCA) on tungsten powder. The morphology and microstructure of tungsten powder in the process of refinement were characterized by field-emission scanning electron microscope (FE-SEM), field …
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Mechanism of Ball Milling and the Factors Affecting the …
PCA exists in a variety of forms (liquids, solids, and gases) and is considered a surface-active agent during milling. Typically, the process control agents are organic …
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The effect of process control agent usage on the structural …
In this study, the effects of the process control agent (toluene) usage on the product size, morphology and conversion level of precursor powders to MgB 2 after subsequent heat treatment was investigated. Different from the previous studies given above, the milling performed within the SPEX mill, and the effect of toluene usage depending on the process variables, such …
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Wet ball milling of niobium by using ethanol, …
In the wet milling technique, process control agents (lubricant or surfactant) such as: ethanol, stearic acid, methanol, hexane etc., are added to the powder mixture during milling to reduce the ...
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Process Control Agent
A process control agent (PCA) is usually used in the process of mechanical alloying to avoid cold welding and bonding between the powder particles and the balls and the agglomeration of …
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Advanced Powder Technology
ball milling, their effect on the properties of the milled powders has not been quantified or understood. ... Effect of organic liquid process control agents on properties of ball-milled powders ...
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Effect of process control agent and mechanical milling on …
The process control agent used It has been reported in the literature that the powder yield is around 9–10% as the Al powder welds with the walls of the ball mill as well as with the balls. The Process Control Agent (1.5% ethanol) helped in controlling the cold weld of Al particles effectively. This occurs because as soon as the ball mill ...
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Effects of interfacial interactions between metal and …
Fe–Si–B–P–Cu nanocrystalline alloy were treated with ball-mill using a lubricant as a process control agent (PCA). The resulting alloy powder is a strong candidate material for …
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Role of Sn as a Process Control Agent on Mechanical …
In this study, the effects of Sn as a process control agent (PCA) on the final powder sizes, morphology, homogenization and alloying process of a new titanium alloy were investigated. ... For the Ti10Ta8Mo3Sn (wt %) alloy, the Sn element was used as PCA to enhance the milling process in the planetary ball mill. The milling process of both ...
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Effects of interfacial interactions between metal and process control
Fe–Si–B–P–Cu nanocrystalline alloy were treated with ball-mill using a lubricant as a process control agent (PCA). The resulting alloy powder is a strong candidate material for soft ...
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Effect of process control agent on the structural and …
Semantic Scholar extracted view of "Effect of process control agent on the structural and magnetic properties of nano/amorphous Fe0.7Nb0.1Zr0.1Ti0.1 powders prepared by high energy ball milling" by M. H. K. Feizabad et al.
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Effect of High-Energy Ball Milling in Toluene on the
Jayashree et al. have synthesized Al 0.3 CoCrFeNi high-entropy alloy by mechanical alloying using methanol and toluene as process control agents. It was reported that ball milling for 5 hours led to a 1.25 wt pct carbon uptake in the case of toluene and 0.777 wt pct in methanol and further annealing yielded an FCC phase alloy containing Cr 7 C ...
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Ball milling process variables optimization for high-entropy …
Stainless steel balls (8 and 50 balls with 10- and 6-mm diameters, respectively), with a ball-to-powder ratio of 10:1, were used for the milling process. 1 wt% ethanol was used as the optimum process control agent [46], to avoid excessive cold …
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Ball milling process variables optimization for high-entropy …
Key MA processing variables that determine the final microstructural evolution in alloy particles are the milling -speed, −time, −temperature, − atmosphere, process control agent (PCA), type of mill, ball-to-powder ratio, type-, size-, size distribution- of milling media etc. [49].
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Effect of the process control agent in the ball-milled …
Process control agent, PCA, used in MA by ball milling can considerably influence the powder morphology and particle size, thereby affecting their densification behaviour [[10], …
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Influence of process control agent and Al concentration on …
Influence of process control agent and Al concentration on synthesis and phase stability of a mechanically alloyed AlxCoCrFeMnNi high-entropy alloy. ... The mixtures were mechanically alloyed in a SPEX 8000M high-energy ball mill at 800 rpm. The used milling media and containers were made of D2 hardened steel; the container size was 5.08 cm in ...
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Effects of Process Control Agents on Characteristics of Cu …
Effects of type and concentration of process control agent on characteristics of the nanocrystalline Cu-1Ta nanocomposite during milling and subsequent sintering were investigated. Microstructural analyses showed that addition of stearic acid (SA) into Cu-1Ta mixture was more effective compared to toluene. The results revealed that application of 2% SA provided a …
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Mechanism of Ball Milling and the Factors Affecting the Process …
Process control agent (PCA). 1.3.1 Ball Mill Type. Ball mills exist in a variety of sizes, capacities, and speeds, and they can control the process by adjusting the milling temperature and reducing powder contamination. As a result, the type, quantity, and final composition of powders used for mechanical alloying are the most important factors ...
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Analysis of the effect of a new process control agent …
Process variables in mechanical milling process such as milling time, milling speed, ball-to powder weight ratio and process control agent have effects on the final structure and morphology of the powders [5].In mechanical milling process, process control agents (PCAs) play a significant role in controlling the particle size and degree of cold welding during ball milling.
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