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Manufacturing and characterization of a ceramic microcombustor with integrated oxygen storage and release element
Uppsala University. (Division of Microsystems Technology)
Försvarshögskolan, Militärvetenskapliga institutionen (MVI), Militärtekniska avdelningen (MTA). Division of Microsystems Technology, Dept. of Engineering Sciences and Ångström Space Technology Centre, Dept. of Engineering Sciences, Uppsala University, Uppsala, Sweden.ORCID-id: 0000-0002-0501-0887
Uppsala University. (Division of Microsystems Technology)
Uppsala University. (Division of Microsystems Technology)
Visa övriga samt affilieringar
2015 (Engelska)Ingår i: Journal of Micromechanics and Microengineering, ISSN 0960-1317, E-ISSN 1361-6439, Vol. 25, nr 10, artikel-id 104006Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A microscale ceramic high-temperature combustor with a built-in temperature sensor and source of oxygen has been designed, manufactured and characterized. The successful in situ electroplating and oxidation of copper, and the use of copper oxide as the source of oxygen were demonstrated. It was shown that residual stresses from electroplating, copper oxidation and oxide decomposition did not cause much deformation of the substrate but influenced mainly the integrity and adhesion of the metal films. The process had influence on the electrical resistances, however. Calibration of the temperature sensor and correlation with IR thermography up to 1000 °C revealed a nearly linear sensor behavior. Demonstration of combustion in a vacuum chamber proved that no combustion had occurred before release of oxygen from the metal oxide resource.

Ort, förlag, år, upplaga, sidor
Bristol: Institute of Physics Publishing (IOPP), 2015. Vol. 25, nr 10, artikel-id 104006
Nyckelord [en]
isotopic analysis, HTCC, combustor, EDS, TGA, RGA, oxygen release
Nationell ämneskategori
Rymd- och flygteknik
Forskningsämne
Försvarssystem
Identifikatorer
URN: urn:nbn:se:fhs:diva-5855DOI: 10.1088/0960-1317/25/10/104006ISI: 000366827400007OAI: oai:DiVA.org:fhs-5855DiVA, id: diva2:899613
Forskningsfinansiär
RymdstyrelsenTillgänglig från: 2016-02-02 Skapad: 2016-02-02 Senast uppdaterad: 2019-09-04Bibliografiskt granskad
Ingår i avhandling
1. Sense, Actuate and Survive: Ceramic Microsystems for High-Temperature Aerospace Applications
Öppna denna publikation i ny flik eller fönster >>Sense, Actuate and Survive: Ceramic Microsystems for High-Temperature Aerospace Applications
2018 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

In aerospace applications, but also in manufacturing, mining, energy industry and natural hazards, high temperature, corrosion, erosion and radiation, challenge the performance and being of hardware.

In this work, high-temperature co-fired ceramic (HTCC) alumina and platinum have been used for a range of devices intended for aerospace applications at up to 1000°C.

The thermomechanics of a pressure sensor was investigated, and the interfacing was attained by wireless powering and reading. However, read range was limited and sensitivity decreased with temperature. Silver, electroplated after sintering, was found to remedy this until it eventually alloyed with platinum.

Copper was electroplated and oxidized for oxygen storage in a microcombustor, intended for sample preparation for optogalvanic spectroscopy (OGS) to indicate extraterrestrial life. Despite delamination, caused by residual stresses, the device operated successfully.

Conversely, pre-firing metallization by integration of platinum wires was studied. Freely suspended, and despite heat-induced shape irregularities, these were found advantageous over screen printed elements for gas heating, and temperature and pressure sensing. By fusing off the wires, spherical tips, allowing for impedance monitoring of microplasma sources in, e.g., OGS, were formed.

Microplasma sources can also be used for gas heating. This, together with screen printed and suspended resistive heaters, was evaluated in a microthruster, showing that plasma heating is the most effective, implying fuel consumption reduction in satellite propulsion.

In conclusion, HTCC alumina microdevices are thermally stable and could benefit several aerospace applications, especially with the complementary metallization schemes devised here.

Future developments are expected to include both processing and design, all with the intention of sensing, actuating and surviving in high-temperature environments.

Ort, förlag, år, upplaga, sidor
Uppsala: Acta Universitatis Upsaliensis, 2018. s. 44
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1696
Nyckelord
high temperature, ceramics, microsystems, aerospace, sensors, thrusters
Nationell ämneskategori
Rymd- och flygteknik Materialteknik
Forskningsämne
Försvarssystem
Identifikatorer
urn:nbn:se:fhs:diva-8743 (URN)978-91-513-0392-5 (ISBN)
Disputation
2018-09-21, Polhemsalen, Ångströmlaboratoriet, Lägerhyddsvägen 1, 09:30 (Svenska)
Opponent
Handledare
Tillgänglig från: 2019-09-04 Skapad: 2019-09-04 Senast uppdaterad: 2019-09-04Bibliografiskt granskad

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Sturesson, Peter

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