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Browsing Theses and Dissertations - Department of Metallurgical and Materials Engineering by Title

Browsing Theses and Dissertations - Department of Metallurgical and Materials Engineering by Title

Now showing items 1-20 of 88

Advanced characterization of the oxidation behavior of grain refined NiAl

White, Rachel Ellen (University of Alabama Libraries, 2019)

Reactive element doped β-NiAl is one of the most oxidation resistant materials available for high temperature use. It has been extensively studied to create the most adherent, slow growing, and passive layer possible. One ...
An analysis of the grain refinement of magnesium by zirconium

Saha, Partha (University of Alabama Libraries, 2010)

A Design of Experiments (DOE) approach was used to conduct a systematic study of the grain refinement of magnesium by zirconium; variables included the amount of zirconium, the pouring temperature, and the settling time ...
Coating yttria stabilized zirconia powders by magnetron sputtering

Togaru, Maanas (University of Alabama Libraries, 2019)

This thesis describes the application of Physical Vapor Deposition (PVD) for coating powders, with the work motivated by the need to provide conformal coatings for nuclear fuel for use in Nuclear Thermal Propulsion (NTP). ...
Containerless melting and characterization of cast magnesium AZ31-B alloy at low superheat in the magnetic suspension melting process

Rimkus, Nathan Wayne (University of Alabama Libraries, 2011)

This study deals with containerless induction melting and characterization of cast magnesium AZ31-B alloy at low superheat via the Magnetic Suspension Melting (MSM) process. The operating conditions for melting and confinement ...
Correlation between heat input and residual stresses from friction stir welding of AA5052 plate

Zhu, Ning (University of Alabama Libraries, 2018)

This thesis investigates the connections between friction stir welding (FSW) parameters, simple energy/heat input metrics, and the resultant residual stresses on AA5052-H32 plates. A range of weldments were produced with ...
Corrosion behavior of haynes 230, ns-163 and incoloy 800h alloys in lif-naf-kf, mgcl2-kcl and mgcl2 molten salt

Peng, Yuxiang (University of Alabama Libraries, 2015)

The behavior of Haynes 230 and NS-163 alloys in fluoride (FLiNaK) and chloride (MgCl2-KCl) salts as well as NS-163 and Incoloy 800H alloys in MgCl2 salt were evaluated based on thermodynamic analysis. Also, corrosion ...
Deformation and phase stability behavior in transition metal carbides

Smith, Chase (University of Alabama Libraries, 2018)

Extreme environment applications require materials that have melting temperatures in excess of 3000 °C and that can retain good mechanical properties at high temperatures. Transition metal carbides (TMCs) are excellent ...
Designing, manufacturing, testing, and optimizing of micro-fuel cells

Lu, Yuhao (University of Alabama Libraries, 2009)

Micro-fuel cells are considered as promising electrochemical power sources in portable electronic devices. Performance of micro-fuel cells are closely related to many factors, such as processes of fabrication, designs of ...
Development of aluminum electrorefining in ionic liquids: the effects of experimental conditions on the deposition behavior and microstructure

Wang, Yifan (University of Alabama Libraries, 2020)

The electrochemical refining of Al from aluminum alloy scrap (Al2020) on copper substrate cathode at low temperature ionic liquid electrolytes was studied. The main components of ionic liquid electrolytes were the mixture ...
Effect of electromagnetic stirring on grain refinement of Al-4.5%Cu alloy

Heyen, Matthew Josef (University of Alabama Libraries, 2013)

There is considerable interest in electromagnetic stirring (EMS) of molten metal during solidification as a means to refine the grain structure and to modify the microstructure of the cast alloy by introducing a convective ...
Effect of nickel content on the crystallization behavior in nanocrystallin (Co_(1-x)Ni_x)_88Zr_7B_4Cu1 soft magnetic alloys

Hornbuckle, Billy Chad (University of Alabama Libraries, 2012)

A series of (Co_(1-x)Ni_x)_88Zr_7B_4Cu1 soft magnetic alloys, where X was varied from 0 to 1, were fabricated by a melt spinning process into thin ribbons of the material. This process was followed by an isothermal anneal ...
Electro-deposition of zinc and lead from their oxide compound using choline chloride and urea based ionic liquid

Yang, Haoxing (University of Alabama Libraries, 2014)

A novel method for electrodepositing metal such as zinc and lead was investigated by using a urea and choline chloride based ionic liquid as electrolyte at low temperature. The solubility analysis of both metal oxides in ...
Electrodeposition of Al-Ni-Cr alloys from chloroaluminate ionic liquid for bond coat on gamma-TiAl

Tan, Kai (University of Alabama Libraries, 2014)

In order to expand the utilization of γ-TiAl for high temperature structural applications, constant efforts have been dedicated to the development of coating systems to provide adequate oxidation resistance above 800oC. ...
Electrodeposition of titanium aluminides from aluminum chloride: 1-butyl-3-methyl imidazolium chloride ionic liquid

Bogala, Mallikharjuna Reddy (University of Alabama Libraries, 2015)

The key for achieving sustainable future depends not only on the discovery of new advanced structural materials, but also on the development of novel energy-efficient technologies for their production and processing in ...
Experimental and numerical study of the reduction of silica in a thermal plasma reactor

Li, Yudong (University of Alabama Libraries, 2019)

High purity silicon production is impeding the expansion of solar energy industry due to high cost. Using high purity SiO2 and carbon, it is possible to economically produce solar grade silicon through two-step process ...
Experimental and theoretical analyses on the ultrasonic cavitation processing of al-based alloys and nanocomposites

Jia, Shian (University of Alabama Libraries, 2015)

Strong evidence is showing that microstructure and mechanical properties of a casting component can be significantly improved if nanoparticles are used as reinforcement to form metal-matrix-nano-composite (MMNC). In this ...
Experimental and theoretical investigation of ultrasonic cavitation processing of Al-based alloys and nanocomposites

Xuan, Yang (University of Alabama Libraries, 2018)

Ultrasonic Treatment (UST) is one of the most promising manufacturing methods to refine the microstructure of casting alloys by transforming the morphology of the grains from dendritic to globular, decreasing the grain ...
Fabrication and characterization of graded magnetocrystalline anisotropy iron-nickel-platinum alloy thin films

Fu, Bianzhu (University of Alabama Libraries, 2011)

The further increase of magnetic storage density is limited by superparamagnetism: the size of the magnetic grains has reached a scale (several nanometers) at which thermal fluctuations can erase the stored information. ...
Flexible nano-memory device by zinc oxide nanorod arrays

Tang, Chaolong (University of Alabama Libraries, 2016)

Memory is one of the key techniques for information technology. It is highly desired to have memory device with flexible characteristic for special applications. The challenges for archiving flexible memory are not only ...
Fundamental research regarding the ultrasonic stirring effects on the microstructure of A356 castings

Jia, Shian (University of Alabama Libraries, 2013)

Ultrasonic stirring treatment (UST) of molten metal has significant effects on the solidification microstructure of A356 alloy, which includes grain structure, distribution of inclusions, refinement of secondary phases, ...

Now showing items 1-20 of 88

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Browsing Theses and Dissertations - Department of Metallurgical and Materials Engineering by Title

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