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Full-Text Articles in Engineering

Electrical Characterization Of Irradiated Semiconducting Amorphous Hydrogenated Boron Carbide, George Glen Peterson Aug 2017

Electrical Characterization Of Irradiated Semiconducting Amorphous Hydrogenated Boron Carbide, George Glen Peterson

Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research

Semiconducting amorphous partially dehydrogenated boron carbide has been explored as a neutron voltaic for operation in radiation harsh environments, such as on deep space satellites/probes. A neutron voltaic device could also be used as a solid state neutron radiation detector to provide immediate alerts for radiation workers/students, as opposed to the passive dosimetry badges utilized today. Understanding how the irradiation environment effects the electrical properties of semiconducting amorphous partially dehydrogenated boron carbide is important to predicting the stability of these devices in operation. p-n heterojunction diodes were formed from the synthesis of semiconducting amorphous partially dehydrogenated boron carbide on silicon …


Lifetime Assessment Tools For Thermal Barrier Systems, Jean Louis Chaboche, Frederic Feyel, Martine Poulain, Noemie Rakotamalala, Arjen Roos, Jean Roch Vaunois, Arnaud Longuet, Pascale Kanaoute Jun 2014

Lifetime Assessment Tools For Thermal Barrier Systems, Jean Louis Chaboche, Frederic Feyel, Martine Poulain, Noemie Rakotamalala, Arjen Roos, Jean Roch Vaunois, Arnaud Longuet, Pascale Kanaoute

Thermal Barrier Coatings IV

No abstract provided.


Tbc Lifetime Under Thermal Gradient Cyclic Testing With Simultaneous Cmas Attack: Towards Prediction Of Advanced Tbc Performance, Daniel Emil Mack, Doris Sebold, Michael Müller, Robert Vaseen, Maria Ophelia Jarligo, Tanja Wobst Jun 2014

Tbc Lifetime Under Thermal Gradient Cyclic Testing With Simultaneous Cmas Attack: Towards Prediction Of Advanced Tbc Performance, Daniel Emil Mack, Doris Sebold, Michael Müller, Robert Vaseen, Maria Ophelia Jarligo, Tanja Wobst

Thermal Barrier Coatings IV

No abstract provided.


A Novel Approach To Predicting The Lifetime Of Elastomers Undergoing Stress Relaxation, Stephen Ronan Sep 2009

A Novel Approach To Predicting The Lifetime Of Elastomers Undergoing Stress Relaxation, Stephen Ronan

Doctoral

his work opens with a broad overview of several factors influencing the behaviour of elastomeric materials under constant deformation. Following this, an evaluation of the common difficulties surrounding industry-standard lifetime prediction methods is presented. Subsequently, a novel method for the lifetime prediction of stress relaxation in elastomeric materials under constant deformation is introduced. Experimental testing to determine the influence of filler type and content was conducted on several natural rubber materials. The effect of altering the vulcanising agent, crosslink density and mixing time was also examined. Chemiluminescence was used to determine the influence that oxidation has on the overall life …