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Electrodeposition Of Antimony From Sulfide Melts, Mahendra N. Rana

Masters Theses

"A study of the current-potential relationships, and the electrodeposition of antimony metal was conducted for fused mixtures of Sb₂S₃-Na₂S, Sb₂S₃-Sb and Sb₂S₃-NaCl-KCl in the temperature range of 700° - 900°C. An attempt was made to determine the mutual solubility of molten antimony and Sb₂S₃-Na₂S melts. The microstructure of deposited metal was studied metallographically. Analysis of phases present in the matte mixture (Sb₂S₃-Na₂S) was made by x-ray diffraction patterns.

All investigations were carried out in …

A Survey Of The Influence Of Selected Sulfides On The Thermal Decomposition Rate Of Zinc Sulfate, L. G. Twidwell

Masters Theses

"The influence which ZnS, CdS, Cu₂S, PbS, and FeS has on the thermal decomposition rate of ZnSO₄ was studied by measuring the SO₂ gas evolved per unit of time for various ZnSO₄-MeS mixtures at 600°C, and analyzing the solid phases by means of X-ray diffraction patterns.

The SO₂ gas evolved upon heating the pellets was analyzed as a function of time by absorbing the gas in a solution of distilled water, H₂O₂, and NaOH, and measuring the time required for the SO₂ to neutralize the NaOH. The gas …

The Missouri Miner, October 27, 1961

The Missouri Miner Newspaper

No abstract provided.

Missouri S&T Magazine, October 1961, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

Perfection Of The Lattice Of Dislocation-Free Silicon, Studied By The Lattice-Constant And Density Method, Martin E. Straumanis, Pierre Borgeaud, William Joseph James

Materials Science and Engineering Faculty Research & Creative Works

The lattice-constant and density method revealed that a high-purity silicon crystal free of dislocations has a perfect lattice without an excess of vacant sites or interstitials (n′=8.0000 4) within the limits of error, in agreement with the results obtained with the decoration method. The lattice constant of vacuum heated silicon powder of semiconductor purity was 5.43070±0.00004 A; that of the nonheat-treated powder was 5.43081 A at 25°C. The constants determined from crystal chips by the rotating crystal method were lower: between 5.43028-5.43048 A at 25°C. As the constants of each series of measurements could be reproduced very well (s=±0.00004 A), …

Missouri S&T Magazine, June 1961, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

Missouri S&T Magazine, February 1961, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

Transpiration Cooling Of A Plane Porous Plate, Raymond George Posgay

Masters Theses

"The transient temperatures were determined in a porous plate for one dimensional heat flow and one dimensional counter coolant flow. One surface of the porous plate was heated by a hot gas by convective heat transfer. A general discussion of the problem is considered and the procedure described for working all such problems dealing with transpiration cooling.

The solution of such problems is illustrated by two examples employing a ceramic plate one inch thick and cooled by a uniform flow of air in a direction counter to the flow of heat, while one surface of the ceramic plate was heated …

Deformations And Bending Moments For A Building Slab With A Central Opening, Wu Ping-Yung

Masters Theses

"The adaptability of the classical slope-deflection method analysis to the analysis of uniformly loaded building slab is the subject of this study. The paper demonstrates the use of slope-deflection in computing deflections and bending moments in uniformly loaded square building slabs both with and without central square openings. The results obtained are compared with results of other methods found by other investigators.

Numerous methods have been proposed for use in solving plate or slab problems. The exact solution in the form of a fourth order partial differential equation has proved to be of value in relatively few cases where boundary …

An Evaluation Of The Addition Of Magnesium Carbonate To Promote Collapsibility In Sodium Silicate Bonded Cores, Wilfred Durairajan Paul

Masters Theses

"Cores are separate sand masses included in the mold to accomplish shapes that would be impossible or difficult to obtain with a normal simple mold cavity.

For example a core made for a pipe casting is expected, first, to support itself when placed in the mold and also withstand handling at room temperature. Second, it should withstand, for a short time, the high temperature of molten metal. Last, it should possess the ability, to completely lose its strength just after the metal around it has completely solidified.

Until recently cores for castings were made using oil bonded sands, with an …

The Effects Of Sulphur And Copper On Hot-Workability Of Pure Iron, Hung-Chi Chao

Masters Theses

"The independent effects of sulphur, copper and their combinations on the hot-workability of pure iron free from other elements was studied, with special emphasis on the red-short phenomenon. Electrolytic pure iron with the addition of 0.023 cent sulphur, 0.33 per cent copper and 0.024 per cent sulphur plus 0.032 per cent copper along with a heat of only electrolytic pure iron was melted under vacuum, and cast under helium pressure. The specimens machined from the forged bars were tested at various temperatures by the hot twist-test and by the constant energy single blow drop forging test to evaluate the hot-workability …

A Method Of Estimating Groundwater Influx Into A Vertical Mine Shaft, Morris T. Worley

Masters Theses

"Prediction of groundwater influx into mine openings is one of the more important pre-development problems encountered in mining. A satisfactory method of estimation would provide the information necessary for a mining company to dewater prior to shaft sinking, pre-grout the shaft area, or plan pumping schemes to handle the expected flow.

A standardized field method of estimating groundwater supply from pumping test data was developed by O. V. Theis and others. In the present research problem, the estimation procedure has been simplified by the use of nomograms. Certain modifications in the estimate must be made when a pumping well is …

Effect Of Deflections For A Flat Plate By Slope-Deflection-Gyration Method, William Hsin-Loo Ying

Masters Theses

"Since the procedure for the theoretical solution of a rectangular flat plate or slab is complex, many approximate methods for determining the moments and deflections of such plate have recently been developed. One of these methods is the so called Slope-Deflection-Gyration Method which is performed by means of basically well-known structural theories - slope-deflection and torsion.

For a given plate, it is assumed that the plate is to be divided up into a grid of strips or equivalent beams at right angles to each other. The joints of this grid are assumed to be rigidly intersected and be permitted to …

The Rollamo 1961, The University Of Missouri School Of Mines And Metallurgy

Yearbooks

No abstract provided.

An Analog Method For The Determination Of The Deflection Of Beams Resting On End Supports And Design Of An Automatic Programming Device, Paul C. Jackson Jr.

Masters Theses

"This investigation shows that beam problems can be solved easily and accurately with an analog computer. Two problems were solved as to their shear, moment, slope and deflection along the length of the beam and the graphs drawn by the analog computer were compared with calculated values. Very little difference was found between them.

An electronic programmer was built to aid in handling beam problems as they were being run on the computer. This was capable of putting into the computer bits of data at specified intervals of time. The programmer proved reliable and repeatable once it was adjusted to …

Use Of Light-Weight Steel Strapping As External Reinforcing To Concrete Beams, John O. Buchanan

Masters Theses

"As a result of some recent failures in reinforced concrete construction throughout the United States, a study was made by several national authorities to find some remedial measures of strengthening existing structures without rebuilding. A system was developed, using high strength steel bands applied externally to beams, to act as stirrups, which has been highly successful. It not only greatly increased the strength of beams already in place but was used to repair members which had already failed.

The application of these bands was made under very exact specifications, using closely controlled procedures, with many physical refinements, in order to …

Effects Of Calcining Temperature On The Physical Properties Of Zirconate Ceramics, P. D. Ownby

Materials Science and Engineering Faculty Research & Creative Works

No abstract provided.

A Study Of The Transient State Of Transpiration Cooling, William C. Wolkenhauer

Masters Theses

"This thesis is a successful attempt to show a new approach to the transpiration cooling problem. Transpiration cooling has long been known as an effective way of removing heat from porous material.

It is shown here that transpiration cooling from a porous material, assuming a temperature difference between the coolant and the porous material, is less effective than where the coolant within the pores is assumed to be at the same temperature as the material adjacent to the pore. Previous investigators made the latter assumption.

The specific problem considered here is that of a uniform, porous plate with constant physical …

Preliminary Study Of An Optimum Vibration Absorber For A Multi-Mass System With Multiple Excitation, John Raymond Burrows

Masters Theses

"The object of this thesis is to demonstrate, by the use of a modern digital computer, a fast, efficient method to eliminate or minimize undesirable stress conditions in a multimass vibrating system with multiple excitation. The condition desired is obtained by the addition of an optimum tuned and damped dynamic vibration absorber, for one critical speed only.

Maximum stress is the criteria used for design here and not amplitude as has been used previously by all other authors.

This solution requires the applied torque to be reevaluated as an average torque and a number of half integer harmonics. This method …

Transpiration Cooling, Herbert S. Brahinsky

Masters Theses

"In the investigation of the problem, it is shown that the process of transpiration cooling is an effective method of cooling. This process may be applied to heat screens or heat shields, as was done in the sample problems worked out here. A porous plate with coolant flowing counter to the flow of heat was used.

The plate temperature is determined by the amount of heat flux, coolant flow, thermal conductivity of the material used as a plate, the specific heat of the fluid, the specific heat of the plate material, the density of the plate material and its porosity. …

An Investigation Of The Factors Influencing The Design Of A Dense Prilled Ammonium Nitrate-Fuel Oil Mixture, Robert Bartley Hopler Jr.

Masters Theses

"The physical characteristics of dense ammonium nitrate prills were examined. The density was found to be 1.52 grams per cubic centimeter, and from this the specific surface was calculated for the size fractions of interest in the investigation. Theoretical loading densities were calculated for between 26.0 and 47.6 percent voids.

The explosive properties of discrete particle size fractions were investigated. The equation by Clark was found to predict the detonation velocity of the sizes smaller than 8/20 mesh. The equation by Cook could not be applied to dense prilled ammonium nitrate. The possibility of a very oxygen negative condition existing …

The Missouri Miner, December 16, 1960

The Missouri Miner Newspaper

No abstract provided.

Missouri S&T Magazine, December 1960, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

The Missouri Miner, November 11, 1960

The Missouri Miner Newspaper

No abstract provided.

Missouri S&T Magazine, August 1960, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

The Missouri Miner, February 05, 1960

The Missouri Miner Newspaper

No abstract provided.

Missouri S&T Magazine, January-February 1960, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

A Method Of Fuel Testing In A Cfr Engine, George R. Baumgartner

Masters Theses

"At the present time, only a very small fraction of motor fuels produced for domestic use in the United States contain any alcohol in their blends. Soma foreign markets, notably the Philippine Islands and South American Countries use high proportions of alcohol in their motor fuel blends. Special purpose fuels in the United States which have alcohol blended with other compounds, have been used for engines from which maximum horsepower output is imperative. An example of this type of motor fuel blend might be found in the competitive motor sports involving motorcycles, stock automotive equipment, and special racing equipment.

An …

The Constitution Of Magnesium-Rich Magnesium-Zirconium Alloys, Kenneth Allen Fowler

Masters Theses

"The magnesium-zirconium system has been studied to 0.8 per cent zirconium which represents the limit of solubility of zirconium in liquid magnesium at 950°C. Alloys have been prepared by two methods of alloy additions, and the results compared. Microstructural studies have been made of the alloys in the cast, extruded, and heat-treated conditions. The limit of solid solubility has been determined on the basis of resistivity and temperature coefficient of resistivity measurements, as well as by metallographic examination, with good agreement. A secondary structure resulting from precipitation of a second phase within cored regions of the alloy has been studied …

The Status Of Gas-Lubricated Bearings, Bhaskar Dattatraya Shiwalkar

Masters Theses

"The idea of gas-lubricated bearings was suggested as far back as 1854 by Hirn, but it is only very recently that they have aroused a great amount of interest. The interest is centered on the advantages of gas-bearings for the following major applications:

1. High temperature lubrication where ordinary liquid or grease lubrication fails.
2. Bearings operating in radio-active atmospheres where conventional lubrication may break down.
3. Applications sensitive to contamination where fouling from lubricating oil becomes serious.
4. Low-friction devices--an especially important advantage because of the trend to high speed machinery.
5. Applications where positional accuracies down to micro-inches are required.

As a result …