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Full-Text Articles in Other Engineering

Effect Of Sintering Temperature On Microstructure, Corrosion Behavior, And Hardness Of Nanocrystalline Al-5at.%Ni And Al-5at.%V Alloys, Matthew G. Wachowiak Jan 2017

Effect Of Sintering Temperature On Microstructure, Corrosion Behavior, And Hardness Of Nanocrystalline Al-5at.%Ni And Al-5at.%V Alloys, Matthew G. Wachowiak

Williams Honors College, Honors Research Projects

The purpose of this project was to investigate thermal stability of high energy ball milled Al-5at.%Ni and Al-5at.%V alloys. Characterization was done by analyzing grain size and solid solubility. Samples were created using high energy ball milling, cold compaction to 3 GPa, and sintering from 100 °C to 500 °C at 100 °C increments, as well 450 °C and 614 °C. Microstructure, mechanical properties, and corrosion properties were determined using scanning electron microscopy, energy dispersive x-ray spectroscopy, x-ray diffraction, hardness testing, and cyclic potentiodynamic polarization. Vickers hardness of Al-5at.%Ni decreased with increasing temperature. For Al-at.%V, hardness ...


Multiplexed Sensor Array For Accurate Time-Of-Wetness (Tow) Measurement, Nathaniel G. Sutton, Hongbo Cong, Jiang John Zhe, Shengxi Li, Xiaoliang Zhu Jan 2017

Multiplexed Sensor Array For Accurate Time-Of-Wetness (Tow) Measurement, Nathaniel G. Sutton, Hongbo Cong, Jiang John Zhe, Shengxi Li, Xiaoliang Zhu

Williams Honors College, Honors Research Projects

In this work, we use electrochemical impedance spectroscopy (EIS) to observe the response of a single, photo-lithographically created, interdigital transducer (IDT) sensor, dimensions 6mm X 6 mm, with capacitive elements 70μm X 500 nm. The IDT was exposed to different wetting conditions, droplets of DI water, 0.1 M NaCl, and 0.6 M NaCl, in volumes of 0.1, 0.3, 1, and 5 μL. Deliquescence of solid NaCl salt particles in a dynamic-humidity (%RH Increasing, 33% to 85%) atmosphere is examined. Equivalent circuit fitting of impedance spectra suggests linear trends for the capacitive equivalent circuit element parameters and ...