Sliding electrical contacts

Turner, Max

doi:10.1049/sqj.1965.0076

Cited by 3 publications

(1 citation statement)

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“…These include powder metal combinations which offer combinations of metals ordinarily cannot be achieved by alloying (ASM [12]). On the other hand, commercially pure copper has high electrical and thermal conductivities and this, together with its ease of fabrication, and its low cost and plentiful supply compared with precious metals, makes it an obvious choice as a contact material (Turner and Turner [13]). However, copper has also some drawbacks such as poor resistance to oxidation and corrosion (ASM [14]).…”

Section: Introductionmentioning

confidence: 99%

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

Biyik

Aydın

2014

WIT Transactions on the Built Environment

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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.

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Section: Introductionmentioning

confidence: 99%