What question did this study set out to answer?

To identify and describe the primary contact erosion and material transfer mechanism occurring in low-current atmospheric pressure arcs.

February 1, 1974Journal of Applied Physics

Electrode erosion by particle ejection in low-current arcs

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Authors

EGEoin W. GrayQueen's University Belfast JPJulian R. PharneyOrthopaedic Research Laboratories

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Implication

Experimental study demonstrates molten metal ejection driven by bombardment recoil in low-current arcs, suggesting a unified contact erosion mechanism across arc types.

Key Points

To identify and describe the primary contact erosion and material transfer mechanism occurring in low-current atmospheric pressure arcs.
Evaluated electrode damage produced by low-current (< 5 A) atmospheric pressure arcs, including high-voltage-gas-breakdown, resistive-make, and resistive- and inductive-break arcs.
Observed and mapped the directional deposition of ejected metal droplets across electrodes in cathode-dominated and anode-dominated arc regimes.
Identified a shared erosion mechanism driven by molten metal ejection from electrode craters via recoil forces following the abrupt cessation of charged particle bombardment.
Detected metal droplets on the anode during cathode arcs and on the cathode during anode arcs, confirming model predictions for ion and electron bombardment, respectively.

Cite This Study

Gray et al. (1974) studied this question.

synapsesocial.com/papers/6a8a5cd41c70e695d8436017 https://doi.org/10.1063/1.1663300

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Implication

Experimental study demonstrates molten metal ejection driven by bombardment recoil in low-current arcs, suggesting a unified contact erosion mechanism across arc types.

Electrode erosion by particle ejection in low-current arcs

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Member takes

Implication

Key Points

Cite This Study

Electrode erosion by particle ejection in low-current arcs

Discussion

Member takes

Implication

Key Points

Cite This Study

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