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Author: mikula
TITLE Zinc-A Possible Component In Lead-Free Solders (Keynote)
SUMMARY Lead-tin solders are commonly used in electronic packaging due to their unique combination of electrical, chemical, physical, thermal and mechanical properties. Since it is known that lead and lead containing alloys cause great environmental concern and health hazards it is necessary to replace lead in solder materials. Besides the environmental concerns new technologies in electronic packaging require new and improved solders. In most cases the new solders will consist of temary or quarternary ...
AUTHOR Adolf, Mikula
PUBLISHED 2003
TITLE A mobile plant for fine coal cleaning
SUMMARY "Funding has been made available through the National Energy Program to build a mobile fine coal treatment plant. The plant is intended f or field application and also to upgrade the existing pilot plant facilities.Western Canadian coals with high proportions of fines (due 10 their friability) cause high losses of fine coal to the reject and in turn reduce the over-all recovery of saleable coal. Eastern Canadian coals with high amounts of sulphur of ten require crushing to fin e sizes to liberat...
AUTHOR Mikhail, M.W. (primary); Mikula, R.J.
PUBLISHED 1984
TITLE Evaluation of a Two Lift Thick Seam Mining Method Based on Partial Extraction of 6m High Square Pillars with Relatively Small Width
SUMMARY This paper presents the results of in-situ and laboratory investigations into a mining method which utilises conventional continuous mining techniques to carry out two passes in thick coal seams, resulting in the development of stable pillars with relatively small width dimensions and heights up to 6 m. Geotechnical investigations included structural mapping, brightness logging and standard laboratory testing. Virgin stress was measured using overcoring techniques. Two approaches to pi...
AUTHOR Mikula PA
PUBLISHED 1986
TITLE Zinc-A Possible Component In Lead-Free Solders (Keynote)
SUMMARY Lead-tin solders are commonly used in electronic packaging due to their unique combination of electrical, chemical, physical, thermal and mechanical properties. Since it is known that lead and lead containing alloys cause great environmental concern and health hazards it is necessary to replace lead in solder materials. Besides the environmental concerns new technologies in electronic packaging require new and improved solders. In most cases the new solders will consist of ternary or quarternary...
AUTHOR Mikula, Adolf
PUBLISHED 2003
TITLE Monitoring of the Sydney Opera House Underground Parking Station
SUMMARY The excavation for the Sydney Opera House Parking Station comprises a large donut shaped underground cavern with a central sandstone pillar. The maximum effective roof span is about 19 m and the rock cover is between 7 m and 8 m. Permanent support for the roof and the various services tunnels consists of a combination of tensioned anchors, and untensioned dowels, and mesh with shortcrete and fibrecrete as the final lining. Steel sets were installed at main intersections.Fundamental to the design...
AUTHOR Mikula P A (primary); Parker C J
PUBLISHED 1993
TITLE Equilibrium Relations in the Nickel-tin System
SUMMARY LITTLE work has been done in the field of the nickel-tin binary system. The complete diagram has been investigated on two occasions, but the results are in very poor agreement. The structure of a compound NiSn, and the solubility of tin in nickel have been determined by X-ray methods. Several investigations have been made of the liquidus curve, and the compositions of the eutectics have been determined. A study of the literature, however, shows that there is no satisfactory agreement between the...
AUTHOR Mikulas, William
PUBLISHED 1937
TITLE Papers - Equilibrium Relations in the Nickel-tin System (With Discussion)
SUMMARY Little work has been done in the field of the nickel-tin binary system. The complete diagram has been investigated on two occasions, but the results are in very poor agreement. The structure of a compound NiSn and the solubility of tin in nickel have been determined by X-ray methods. Several investigations have been made of the liquidus curve, and the compositions of the eutectics have been determined. A study of the literature, however, shows that there is no satisfactory agreement between the ...
AUTHOR Thomassen, William Mikulas Lars (primary); Upthegrove, Clair
PUBLISHED 1937
TITLE Part 1: Cleaning Low-Rank Coal
SUMMARY Cleaning of low-rank coals can have several meanings, depending upon the definitions of the terms"low rank"and"cleaning."In general, low-rank coals would be lignite or subbituminous according to the ASTM classification. For the purposes of this summary, cleaning is defined to be any process which materially reduces the proportion of inert material in the coal. For low-rank coals, this often means a reduction in moisture content since moisture is the major inert component in these coals. A brief ...
AUTHOR Mikula, Randy J.
PUBLISHED 1991
TITLE Papers - Equilibrium Relations in the Copper Corner of the Ternary System Copper-tin beryllium (With Discussion)
SUMMARY The widespread interest in the alloys of beryllium with copper is due principally to the fact that certain compositions show very favorable precipitation-hardening characteristics and are, in fact, the stronges nonferrous alloys known at the present time. Investigations have been conducted by Masing and Dahl and others on the physical characteristics of ternary beryllium alloys, in an attempt to produce precipitation hardening effects with a smaller amount of beryllium than that required in the ...
AUTHOR Rowland, E. S. (primary); Upthegrove, Clair
PUBLISHED 1935
TITLE Thermodynamics and Phase Diagram of New Solder Materials
SUMMARY "Unique physical and mechanical properties made the Pb-Sn solders attractive for low temperature joining of electronic parts. But since lead in solder materials has become a great enviromental problem and health concern, lead will be slowly replaced by other materials in soft solders. Some of these materials which are currently under investigation are ternary tin alloys. Many different physical properties like wetting behavior, electrical and thermal conductivity and surface tension are measured...
AUTHOR Karlhuber, S. (primary); Mikula, A.
PUBLISHED 1996