Development and Characterization of a Novel Additive Manufacturing Technology Capable of Printing Propellants with High Solids Loadings

Metadata Updated: May 2, 2019

Ever since rockets have been around, there has been a demand to improve propulsion systems by increasing propellant performance in order to reduce production time and costs. It is known that propellant burning rates can be enhanced with geometric manipulation and that Additive Manufacturing (AM), particularly Fuse Deposition Modeling (FDM), has demonstrated its ability to create unique geometries with high resolution at lower costs. However, it is currently impossible to print heterogeneous materials with high solids loadings. This is an issue because many solid and hybrid propellants rely on high solids loadings for high performance. Solids loadings could be lowered, but this would significantly reduce performance.

The purpose of this proposal is to present a new AM technology that has been demonstrated to print heterogeneous materials with solids loadings comparable to current industry standards. This is revolutionary because propellants that were previously regarded as unprintable can now be printed, which opens the door to improve propellant burning rates with new geometries. This technology is very new and needs to be developed and understood through parameter characterization. System properties such as nozzle dimensions and printing path and material properties such as viscosity and reaction characteristics will be studied to determine material printability. The mechanical integrity of the prints will be tested as well. Compatible propellants that are competitive with industry standards will be printed into unique geometries and with functionally graded regions where the burning rate varies locally by varying the distribution of reactive additives. The burning rate of those samples will be compared to cylindrical samples in order to determine those effects. Promising geometries will be scaled up to a small rocket motor and will be compared to standardly used grain geometries.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_94179
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Datagov Dedupe Retained 20190501230127
Harvest Object Id 75943086-f0d9-4110-b2e5-c8cc1fcf05b8
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2019-09-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash a53cb9f183cf009349a2f460411bdb6dd96a6908
Source Schema Version 1.1

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