Open Access. Powered by Scholars. Published by Universities.®
Missouri University of Science and Technology
Materials Science and Engineering Faculty Research & Creative Works
- Discipline
-
- Materials Science and Engineering (639)
- Metallurgy (146)
- Ceramic Materials (117)
- Physical Sciences and Mathematics (37)
- Mechanical Engineering (36)
-
- Manufacturing (27)
- Physics (24)
- Chemistry (11)
- Electrical and Computer Engineering (11)
- Civil and Environmental Engineering (8)
- Computer Sciences (7)
- Numerical Analysis and Scientific Computing (7)
- Aerospace Engineering (6)
- Structural Engineering (5)
- Structural Materials (5)
- Biology (4)
- Life Sciences (4)
- Mining Engineering (4)
- Chemical Engineering (2)
- Architectural Engineering (1)
- Architecture (1)
- Biochemical and Biomolecular Engineering (1)
- Civil Engineering (1)
- Energy Policy (1)
- Geological Engineering (1)
- Nuclear Engineering (1)
- Petroleum Engineering (1)
- Public Affairs, Public Policy and Public Administration (1)
- Social and Behavioral Sciences (1)
- Keyword
-
- Sintering (13)
- Microstructure (12)
- Ceramics (11)
- Additive Manufacturing (10)
- Ferroelectricity (9)
-
- Mechanical properties (9)
- Permittivity (8)
- Polarization (8)
- Rheology (8)
- Borides (7)
- Oxidation (7)
- Spinel (7)
- Carbides (6)
- Densification (6)
- Ferroelectric materials (6)
- Glass (6)
- Steelmaking (6)
- Strength (6)
- Structure (6)
- Additive manufacturing (5)
- Barium Compounds (5)
- Ferroelectric Materials (5)
- Hardness (5)
- Lead Compounds (5)
- Mechanical activation (5)
- Metallurgy (5)
- Phase transitions (5)
- Steel Foundry Operations (5)
- Yttrium (5)
- Barium derivative (4)
- Publication Year
Articles 601 - 630 of 640
Full-Text Articles in Engineering
Nonstoichiometry In Batio3, G. J. Conger, Harlan U. Anderson
Nonstoichiometry In Batio3, G. J. Conger, Harlan U. Anderson
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Irradiation Enhanced Decomposition Of A Nickel-Carbon Solid Solution, B. L. Shriver, Manfred Wuttig
Irradiation Enhanced Decomposition Of A Nickel-Carbon Solid Solution, B. L. Shriver, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
This investigation was performed to determine the effects of room temperature neutron irradiation on the distribution of carbon in a nickel-0.3 wt.% carbon alloy. The experiment consisted of comparing the amount of carbon in solid solution and the internal stresses of both unirradiated and irradiated (1013 fn-cm-2 < ΦF < 1018 fn-cm-2) samples following isochronal anneals between 100 and 1200°C by using the magnetic Dis accommodation technique. The results indicate that the amount of carbon remaining in solid solution decreases with increasing neutron dose. At temperatures below 200°C this is due to the trapping of carbon by mobile irradiation-produced defects. Between 200 and 600°C the formation of metastable carbides is enhanced by the presence of irradiation-produced defects. No differences are observed in irradiated and unirradiated samples above 600°C. © 1972.
Dissolution Potentials And Activation Energies Of Insb Single Crystals, Martin E. Straumanis, Lih Da Hu
Dissolution Potentials And Activation Energies Of Insb Single Crystals, Martin E. Straumanis, Lih Da Hu
Materials Science and Engineering Faculty Research & Creative Works
The rest (or corrosion) and dissolution potentials of InSb single crystals in HC1 were determined. There is no potential difference (within error limits) between the inverse {111} faces in pure HC1. A difference of up to 44 mV and more develops as soon as the InSb electrode is anodically dissolved. The potential becomes less noble in the sequence In{111}, {100}, {110}, Sb{111}. The Tafel relationship is observed over three decades of current density. With additions of FeCl3, FeCl2, K3Fe(CN)6, K4Fe(CN)6, H2C4H4O6 to 2N HC1, the anodic potentials of both inverse {111} faces are shifted to more active values; the e'H …
Comment On The Nature Of The Disaccommodation In Hcp Co-C Alloys, J. Keiser, Manfred Wuttig
Comment On The Nature Of The Disaccommodation In Hcp Co-C Alloys, J. Keiser, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Polynary Telluride Glasses Containing Silver, H. E. Anthonis, N. J. Kreidl
Polynary Telluride Glasses Containing Silver, H. E. Anthonis, N. J. Kreidl
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Thermal Expansion Behavior Of Silicon At Low Temperatures, Jayant S. Shah, Martin E. Straumanis
Thermal Expansion Behavior Of Silicon At Low Temperatures, Jayant S. Shah, Martin E. Straumanis
Materials Science and Engineering Faculty Research & Creative Works
Lattice parameters, thermal expansion coefficients and Grüneisen parameters of silicon are determined by an X-Ray diffraction method in the temperature range of 180-40 K without the use of liquid gases. Thermal expansion of silicon becomes negative below 120 K which is discussed in terms of its lattice vibrations and crystal structure. © 1972.
Thermal Expansion Of Tungsten At Low Temperatures, Jayant S. Shah, Martin E. Straumanis
Thermal Expansion Of Tungsten At Low Temperatures, Jayant S. Shah, Martin E. Straumanis
Materials Science and Engineering Faculty Research & Creative Works
Lattice parameters, thermal expansion coefficients, and Grüneisen parameters of tungsten are determined by an x-ray method in the temperature range of 180-40 K without the use of liquid gases. Lattice parameters are expressed as a function of temperature. Thermal-expansion coefficients decrease with temperature and show no anomaly in contrast to a hypothesis proposed by Featherston and Neighbours. Grüneisen parameters γ are decreasing with temperature in accordance with the theoretical predictions. © 1971 The American Institute of Physics.
Structure And Properties Of Silver Borate Glasses, E. N. Boulos, N. J. Kreidl
Structure And Properties Of Silver Borate Glasses, E. N. Boulos, N. J. Kreidl
Materials Science and Engineering Faculty Research & Creative Works
Clear glasses form in the system Ag2O‐B2O3 up to about 35 mol% (65 wt%) Ag2O. Infrared absorption, thermal expansion, and density data indicated an analogy to the Na2O‐B2O3 system. Pentaborate‐triborate group pairs appear to be formed on addition of Ag2O to B2O3 up to 20 mol% Ag2O and diborate groups from 20 to 33 mol% Ag2O. This interpretation is supported by the comparison of the infrared absorption spectra of quenched and crystallized glasses. One crystallization product, Ag2O‐4B2O3, was …
The Anodic Dissolution Reaction Of Insb: Etch Patterns, Electron Number, Anodic Disintegration, And Film Formation, Martin E. Straumanis, Lih Da Hu
The Anodic Dissolution Reaction Of Insb: Etch Patterns, Electron Number, Anodic Disintegration, And Film Formation, Martin E. Straumanis, Lih Da Hu
Materials Science and Engineering Faculty Research & Creative Works
The etching behavior of the inverse {111} planes of undoped, semiconducting, n-type, InSb single crystals was explored. Depending upon the etchant, including anodic dissolution, various etch patterns were obtained on the inverse planes. In general, the etch pits on the In{111} plane were round, and the face was shiny, whereas the face of the inverse plane was dark and rough. The rates of dissolution in the electrolytes used were very low, especially in absence of oxidizers. The components dissolve as In3+ and Sb3 +. At current densities above 40 or 60 mA cm-2 (on Sb{111} or In{111}), growth of a …
Thermal Expansion Of Pb3o4, Charles A. Sorrell
Thermal Expansion Of Pb3o4, Charles A. Sorrell
Materials Science and Engineering Faculty Research & Creative Works
Thermal expansion of Pb3O4 was investigated by high‐temperature X‐ray diffraction. The coefficient in the a0 direction is 14.6x10−6/°C. Expansion in the c0 direction is 32% greater, with a coefficient of 19.3x10−6/°C. Coefficients of expansion are linear from 25° to 490°C and are comparable with those of tetragonal and orthorhombic PbO. Copyright © 1971, Wiley Blackwell. All rights reserved
Activation Volumes Of Interstitial Diffusion In Ferromagnetic Metals And Alloys, Manfred Wuttig, J. Keiser
Activation Volumes Of Interstitial Diffusion In Ferromagnetic Metals And Alloys, Manfred Wuttig, J. Keiser
Materials Science and Engineering Faculty Research & Creative Works
The Dis accommodation technique was used to determine the activation volumes of carbon diffusion ΔV of a Fe-1.4 wt% Si alloy, of hcp cobalt, and of nickel at the temperatures of -21, 75, and 110°C, respectively. The obtained values of ΔV are +0.3 ± 0.3 and -0.6 ± 0.9 cm3 mole-1 for the two relaxations observed in hcp cobalt, and 1.2 ± 0.1 cm3 mole-1 for nickel. These results are discussed in terms of a continuum model that interprets the activation energy of diffusion as a sum of the strain and exchange energies. It is found that in ferromagnetic solids …
On The Activation Entropy Of Interstitial Diffusion In B.C.C. Iron, Manfred Wuttig
On The Activation Entropy Of Interstitial Diffusion In B.C.C. Iron, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
A Magnetic Aftereffect In Dilute H.C.P. Co-C Alloys, J. R. Keiser, Manfred Wuttig
A Magnetic Aftereffect In Dilute H.C.P. Co-C Alloys, J. R. Keiser, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
A magnetic Dis accommodation in dilute h.c.p. Co-C alloys has been observed around 90°C. The thermally activated process giving rise to the Dis accommodation is characterized by an activation energy of 26 kcal mole-1 and an attack frequency on the order of 10+13 sec-1. An application of the selection rules shows that the Dis accommodation cannot be caused by the redistribution of tetrahedral or octahedral interstitials or any nearest neighbor interstitial pairs as long as the defects interact linearly with the internal magnetic field. © 1971.
Liquid Viscosity Measurement Using A Buret: An Instructional Technique, Charles A. Sorrell
Liquid Viscosity Measurement Using A Buret: An Instructional Technique, Charles A. Sorrell
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Mixed‐Cation Effect In Silver Borate Glasses, E. N. Boulos, N. J. Kreidl
Mixed‐Cation Effect In Silver Borate Glasses, E. N. Boulos, N. J. Kreidl
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Stored Energy Of Room Temperature Deformed Copper, G. J. Filatovs, Hollis P. Leighly
Stored Energy Of Room Temperature Deformed Copper, G. J. Filatovs, Hollis P. Leighly
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Diffusion In Wide Grain Boundaries, J. Mimkes, Manfred Wuttig
Diffusion In Wide Grain Boundaries, J. Mimkes, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
The rigorous solution of the grain-boundary diffusion problem has been approximated by a series expansion method. The calculations show that higher-order terms may be neglected in the bulk adjacent to the grain boundary. Thus, in this region Whipple's and Suzuoka's solutions represent a close approximation to the problem. Inside the grain boundary, however, higher-order approximations have to be taken into account. These approximations gain importance in the case of wide grain boundaries. The solutions obtained for an instantaneous source have been fitted to available grain-boundary diffusion data of Ni2+ in MgO at 1200°C. Numerical calculations give for the bulk diffusion …
Thermal Expansion Of Tungsten At Low Temperatures, Jayant S. Shah, Martin E. Straumanis
Thermal Expansion Of Tungsten At Low Temperatures, Jayant S. Shah, Martin E. Straumanis
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Phase Equilibria And Thermodynamic Studies In The System Cao-Feo-Fe2o3-Sio2, M. Timucin, Arthur E. Morris
Phase Equilibria And Thermodynamic Studies In The System Cao-Feo-Fe2o3-Sio2, M. Timucin, Arthur E. Morris
Materials Science and Engineering Faculty Research & Creative Works
Phase equilibria and thermodynamic properties of the system CaO-FeO-Fe2O3-SiO2 were studied at 1450° and 1550°C, over a range of pO2 from 1 to about 10-11 atm. Isothermal phase diagrams and activity-composition diagrams were constructed for 0, 5, 10, 20, and 30 wt pct SiO2 sections. The data are applicable to further understanding the behavior of simple BOF steelmaking slags. © 1970 The Minerals, Metals & Materials Society - ASM International - The Materials Information Society.
The Fe-Ho Binary System, G. J. Roe, Thomas J. O'Keefe
The Fe-Ho Binary System, G. J. Roe, Thomas J. O'Keefe
Materials Science and Engineering Faculty Research & Creative Works
The Fe-Ho phase diagram was determined on the basis of data obtained by X-ray diffraction, metallographic and differential thermal analysis techniques. Since emphasis was centered in the region where intermetallic compounds predominate, neither the iron nor holmium terminal regions were included in this study. Eutectic reactions were found to occur at 16.5 wt pct Fe and 875° C, 61 wt pct Fe and 1284° C, and 79 wt pct Fe and 1338° C. The congruent melting points of the compounds Ho6Fe23 and Ho2Fe17 were found to be 1332° and 1343° C, respectively. Two other intermetallic compounds were found, HoFe2 and …
Electron Emitter Tips And Method, P. D. Ownby
Electron Emitter Tips And Method, P. D. Ownby
Materials Science and Engineering Faculty Research & Creative Works
Boron is deposited on the (110) plane facet at the center of a tungsten electron emitter tip by chemical vapor deposition of boron triiodide. The emission current density is greatest in the center of the emitting area (FIG. 2).
Thermal Expansion Of Orthorhombic Pbo, Charles A. Sorrell
Thermal Expansion Of Orthorhombic Pbo, Charles A. Sorrell
Materials Science and Engineering Faculty Research & Creative Works
Thermal expansion of orthorhombic PbO was investigated by high‐temperature X‐ray diffraction. The coefficients in the a0, and c0 directions are equal and Pb–O chains extended in the a0 direction and bonded into layers in the b0 direction; appreciable Pb–Pb bonding is indicated. Coordination and bond distances observed in PbSiO3 and lead silicate glasses, which are similar to those of massicot, and PbnOn polymeric units reported in PbO vapor are interpreted as additional evidence of the importance of PbO chains as structural entities. Copyright © 1970, Wiley Blackwell. All rights reserved
Thermal Expansion Of Tetragonal Pbo, Charles A. Sorrell
Thermal Expansion Of Tetragonal Pbo, Charles A. Sorrell
Materials Science and Engineering Faculty Research & Creative Works
Thermal expansion of tetragonal PbO, investigated by high‐temperature X‐ray diffraction in vacuum, is nearly isotropic, with the coefficient in the c0 direction only slightly greater than that in the a0 direction. Volume thermal expansion is only slightly greater than in massicot. Retardation of the litharge‐massicot transformation is tentatively interpreted as the result of very low oxygen partial pressures caused by catastrophic oxidation of the stainless‐steel sample holder and resulting oxygen scavenging by lead vapor. Copyright © 1970, Wiley Blackwell. All rights reserved
Carburization Of Type 316l Stainless Steel In Static Sodium, F. B. Litton, Arthur E. Morris
Carburization Of Type 316l Stainless Steel In Static Sodium, F. B. Litton, Arthur E. Morris
Materials Science and Engineering Faculty Research & Creative Works
The transport of carbon from an iron-87 wt.% carbon alloy through static sodium to Type 316L stainless steel was investigated at temperatures of interest to the liquid-metal fast-breeder reactor (LMFBR) program. The rate-controlling step for the experimental geometry employed was the diffusion of carbon in the source. © 1970.
Exact Solution For A Model Of Dislocation Pipe Diffusion, J. Mimkes, Manfred Wuttig
Exact Solution For A Model Of Dislocation Pipe Diffusion, J. Mimkes, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
The dislocations are treated as an ideal array of parallel pipes of radius and diffusivity Dp embedded in the bulk material of the diffusivity Db. The exact solution of this problem of diffusion along semi-infinite edge dislocations is presented for cubic, tetragonal, and hexagonal crystals. The solution makes it possible to evaluate the dislocation pipe radius a and the ratio of diffusivities from one experiment. It is applied to experimental data for self-diffusion in tellurium available in the literature. The results of the calculations are a dislocation pipe radius a=(1.5 0.5)x10-4 cm and an activation energy for the pipe diffusion …
Cation Grain-Boundary Diffusion In Sodium Chloride, K. R. Riggs, Manfred Wuttig
Cation Grain-Boundary Diffusion In Sodium Chloride, K. R. Riggs, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Additional Magnetic Disaccommodations In Ternary Iron Base Alloys, R. H. Graham, Manfred Wuttig
Additional Magnetic Disaccommodations In Ternary Iron Base Alloys, R. H. Graham, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Isotope Effect Of Carbon Diffusion In An Fe-Si Alloy, Manfred Wuttig, E. T. Yen
Isotope Effect Of Carbon Diffusion In An Fe-Si Alloy, Manfred Wuttig, E. T. Yen
Materials Science and Engineering Faculty Research & Creative Works
The isotope effect of carbon diffusion in dilute iron silicon alloys containing 28Si and 30Si has been measured below room temperature using the Dis accommodation technique. The time dependence of the reluctivity has been analyzed in terms of two relaxation processes which are due to the reorientation of carbon interstitials in Fe-Fe and Fe-Si sites respectively. The ratio of the relaxation times of the two carbon isotopes 13C and 12C τ13/τ12 is 1.037 for the former and 1.007 for the latter process in the Fe+28Si alloy. The ratios of the relaxation times of the same carbon isotope 12C contained in …
On The Influence Of Surface Roughness On The Determination Of Diffusion Constants, Manfred Wuttig
On The Influence Of Surface Roughness On The Determination Of Diffusion Constants, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Interstitial Solute Trapping In Irradiated And Quenched Iron, M. (Manfred) Wuttig, J. T. Stanley, H. K. Birnbaum
Interstitial Solute Trapping In Irradiated And Quenched Iron, M. (Manfred) Wuttig, J. T. Stanley, H. K. Birnbaum
Materials Science and Engineering Faculty Research & Creative Works
The interaction of interstitial carbon and nitrogen solutes with defects produced by low temperature neutron irradiation and by quenching was studied in high purity and Ferrovac E iron. Magnetic Dis accommodation techniques were applied to determine the interstitial solute content after irradiation and upon annealing. Doses of about 1017 neutrons/cm2 caused the trapping of about 20 ppm (atomic) interstitial solutes at 65 (carbon) and 40°C (nitrogen). Trapping of carbon in a Ferrovac E iron alloy occurred during a fast quench from 880°C. After trapping, the interstitial solutes reappeared in solid solution at 300 (carbon, neutron irradiation), 200 (nitrogen, neutron irradiation), …