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Indentation of Solid Nitrogen Between 30 K and 40 K

Citation

Hacker , Zachary David . (2021-12). Indentation of Solid Nitrogen Between 30 K and 40 K. Theses and Dissertations Collection, University of Idaho Library Digital Collections. https://www.lib.uidaho.edu/digital/etd/items/hacker_idaho_0089n_12198.html

Title:
Indentation of Solid Nitrogen Between 30 K and 40 K
Author:
Hacker , Zachary David
Date:
2021-12
Keywords:
Cryocrystal Indentation Cryogenic Indentation Solid Nitrogen Triton Hopper
Program:
Mechanical Engineering
Subject Category:
Materials Science
Abstract:

This research was completed in support of the proposed NASA mission, Triton Hopper, whose intended mission is to land on Triton, a moon of Neptune. Flight over Tritons surface is to be provided by repurposing in situ resources; where solidified nitrogen is gathered, heated, and used as a gaseous propellant. Mechanical property data of solid nitrogen at Triton surface conditions is almost nonexistent. A system was designed to gather hardness data via flat punch indentation of cryocooler formed solidified nitrogen samples. The system was used to collect data at temperatures between 30 and 40K at 1-degree increments. Hardness averages ranged from 0.35 Mpa to 2.26 Mpa as temperature decreased, the data were approximately 3 to 4 times harder than prior data. The system was modified and used to conduct rotary shear testing. Based on the results, suggestions for further work are provided.

Description:
masters, M.S., Mechanical Engineering -- University of Idaho - College of Graduate Studies, 2021-12
Major Professor:
Maughan , Michael
Committee:
Stephens , Robert ; Leachman , Jacob ; Potirniche , Gabriel
Defense Date:
2021-12
Identifier:
Hacker_idaho_0089N_12198
Type:
Text
Format Original:
PDF
Format:
application/pdf

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