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MMaJIC, an Experimental Chamber for Investigating Soldering and Brazing in Microgravity

Shannen Daly

Shannen Daly

Department of Mechanical and Aerospace Engineering, West Virginia UniversityMorgantown,
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Daly, Shannen
, 
Micah Hardyman

Micah Hardyman

Department of Mechanical Engineering, Tennessee Technological UniversityCookeville,
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Hardyman, Micah
, 
James Ragan

James Ragan

Department of Aeronautics & Astronautics, University of WashingtonSeattle,
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Ragan, James
, 
Joseph Toombs

Joseph Toombs

Department of Mechanical Engineering, University of Illinois at Urbana-ChampaignUrbana,
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Toombs, Joseph
, 
Tracie Prater

Tracie Prater

Materials and Processes Laboratory, Marshall Space Flight CenterHuntsville,
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Prater, Tracie
 et 
Richard N. Grugel

Richard N. Grugel

Materials and Processes Laboratory, Marshall Space Flight CenterHuntsville,
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Grugel, Richard N.
  
21 juil. 2020
MMaJIC, an Experimental Chamber for Investigating Soldering and Brazing in Microgravity's Cover Image
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Catégorie d'article: Research Article
Publié en ligne: 21 juil. 2020
Pages: 28 - 34
DOI: https://doi.org/10.2478/gsr-2017-0008
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© 2017 Shannen Daly et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Photograph of ISS Science Officer, Mike Fincke, conducting a set of melting experiments within the Maintenance Work Area. The sample on the left was just completed, the central one is being melted, and the one on the right shows 10 cm of solder wrapped about the top of the wire prior to melting. The yellow material is rosin from the solder-wire core.
Photograph of ISS Science Officer, Mike Fincke, conducting a set of melting experiments within the Maintenance Work Area. The sample on the left was just completed, the central one is being melted, and the one on the right shows 10 cm of solder wrapped about the top of the wire prior to melting. The yellow material is rosin from the solder-wire core.

Figure 2

An optical micrograph from one of the ISSI samples processed in Figure 1. Flux bubbles (porosity) are seen at the solder/copper wire (joint) interface. This porosity compromises thermal and electrical conductivity as well as reduces mechanical strength.
An optical micrograph from one of the ISSI samples processed in Figure 1. Flux bubbles (porosity) are seen at the solder/copper wire (joint) interface. This porosity compromises thermal and electrical conductivity as well as reduces mechanical strength.

Figure 3

Photographs of the Microgravity Materials Joining Investigative Chamber (MMaJIC) containment box. 3A shows the box with an inserted sample tray and the door open. 3B is a close-up of the removable top showing the indicator LEDs, power switch, start button, and LCD panel.
Photographs of the Microgravity Materials Joining Investigative Chamber (MMaJIC) containment box. 3A shows the box with an inserted sample tray and the door open. 3B is a close-up of the removable top showing the indicator LEDs, power switch, start button, and LCD panel.

Figure 4

Photographs of the Microgravity Materials Joining Investigative Chamber (MMaJIC) sample tray. Dimensions of the tray are, including handle and plug, approximately 23 cm × 16 cm × 20 cm. The left, smaller chamber houses experiment-specific electronics, including the data acquisition card. The chamber on the right shows the kanthal heating wires. The 20 samples consist of a small copper foil, tightly wrapped around the wire, around which 10 cm of a lead-tin rosin-core solder was then added. Two control thermocouples are seen at the bottom of the left and right wires.
Photographs of the Microgravity Materials Joining Investigative Chamber (MMaJIC) sample tray. Dimensions of the tray are, including handle and plug, approximately 23 cm × 16 cm × 20 cm. The left, smaller chamber houses experiment-specific electronics, including the data acquisition card. The chamber on the right shows the kanthal heating wires. The 20 samples consist of a small copper foil, tightly wrapped around the wire, around which 10 cm of a lead-tin rosin-core solder was then added. Two control thermocouples are seen at the bottom of the left and right wires.

Figure 5

Microgravity Materials Joining Investigative Chamber (MMaJIC) system block diagram.
Microgravity Materials Joining Investigative Chamber (MMaJIC) system block diagram.

Figure 6

Microgravity Materials Joining Investigative Chamber (MMaJIC) user interface block diagram.
Microgravity Materials Joining Investigative Chamber (MMaJIC) user interface block diagram.

Figure 7

Plot of thermocouple data showing heating and cooling of the nichrome wires from which heat is conducted to melt the samples during the experiment. Note that the tip region of theromocouple 1 was not in contact with the heating wire.
Plot of thermocouple data showing heating and cooling of the nichrome wires from which heat is conducted to melt the samples during the experiment. Note that the tip region of theromocouple 1 was not in contact with the heating wire.
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Sciences de la vie, Sciences de la vie, autres, Sciences des matériaux, Sciences des matériaux, autres, Physique, Physique, autres
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