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Keywords: boron
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7661-4
... A high-sensitivity boron-diffused silicon carbide (4H-SiC) p-n diode has been designed and fabricated using vapor-phase epitaxy. Boron-10 ( 10 B) is diffused into nitrogen-doped n − SiC, forming the p + layer, and thermal neutrons are detected through the ionization produced in the detector...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2006
ISBN-10: 0-8031-3408-8
ISBN: 978-0-8031-3408-9
... Phytoremediation is the direct application of green plants and their associated microorganism to stabilize or absorb contaminants from soils, sludge, sediments, surface water, or groundwater. Boron and fluoride were listed to the soil standards a few years ago in Japan; however, few researches...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2614-X
ISBN: 978-0-8031-2614-5
... Six split melt A533B-type model alloys, with different combinations of copper, nickel and boron contents, were irradiated at 60°C in a neutron spectrum with a thermal-to-fast (E > 1 MeV) ratio of about 370. The resulting yield stress increases were compared to hardening produced...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1994
ISBN-10: 0-8031-2011-7
ISBN: 978-0-8031-2011-2
... covered the range 0.7 to 3500 ppm and boron was added at 300, 600 and 1200 ppm. Weight gain, Fourier Transform InfraRed (FTIR) spectroscopy, and Secondary Ion Mass Spectrometry (SIMS) were used to characterize the oxide films. Potentiodynamic polarization measurements were made in separate tests at 315°C...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1992
ISBN-10: 0-8031-1477-X
ISBN: 978-0-8031-1477-7
... nuclei such as boron or beryllium. This is due to the fact that the intranuclear cascades in light nuclei are small enough so that very few nucleons share the energy of incoming particles. Furthermore, production of low-energy neutrons is suppressed since neutrons are mainly produced by direct particle...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1267-X
ISBN: 978-0-8031-1267-4
... A boron doping technique was employed to determine the microstructural response to differences in the rate of helium generation in vanadium under fission and fusion irradiation environments. Helium is enriched in the regions around boride and somewhat in the matrix due to (n,α) reactions, when...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1267-X
ISBN: 978-0-8031-1267-4
... Tensile properties at 298 and 77 K of the electron-beam-welded joints of low neutron activation vanadium-binary alloys were evaluated. (1) Yield and tensile strengths of the welded specimens increased with an increase of carbon of up to 1.6%, boron of up to 5.0% and chromium of up to 9.3...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1990
ISBN-10: 0-8031-1266-1
ISBN: 978-0-8031-1266-7
... the radiation-caused vacancies to grain boundaries and interstitials to dislocations. These fluxes are linearly dependent on the generation rate of defects in pure nickel and iron, while for both the stainless steel and iron-boron alloy for the temperature interval of 700 to 950 K in the generation rate region...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1259-9
ISBN: 978-0-8031-1259-9
..., designated UNS S38660. Substantial improvement can be produced in the creep rupture behavior of this alloy. Elements such as phosphorus and boron, typically present in trace quantities, have a significant influence on the creep strength of austenitic stainless steels. Several heats of alloy S38660 were made...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1259-9
ISBN: 978-0-8031-1259-9
... Systematic variations in the chromium, nickel, copper, molybdenum, and boron and B contents of American Iron and Steel Institute (AISI) Type 304 stainless steel (UNS S30400) were evaluated by electrochemical and immersion corrosion tests in oxidizing, reducing, and chloride solutions. In one...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1987
ISBN-10: 0-8031-0459-6
ISBN: 978-0-8031-0459-4
... as the edge profile curvature was increased. edge profile implant doping doping profile undercut Silicon Boron Phosphorus SF 6 C 2 ClF 5 polysilicon PSG Tom Abraham and Robert Theriault PROFILE CONTROL OF PLASMA ETCHED POLYSILICON USING IMPLANT DOPING REFERENCE; Abraham, T., and Theriault...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1987
ISBN-10: 0-8031-0459-6
ISBN: 978-0-8031-0459-4
... shallower than measurements made by SIMS. The SRP and SIMS profiles were compared to those profiles simulated with SUPREM, a process modeling computer program. silicon arsenic boron secondary ion mass spectrometry spreading resistance depth profiling George G. Sweeney and Tony R, Alvarez...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1987
ISBN-10: 0-8031-0459-6
ISBN: 978-0-8031-0459-4
... A controlled experiment was performed for a comparative investigation of dopant profiles by secondary ion mass spectrometry (SIMS), spreading resistance (SR), and process modeling. Boron profiles of varying junction depth were considered. These profiles were generated by boron ion implantation...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1984
ISBN-10: 0-8031-0403-0
ISBN: 978-0-8031-0403-7
..., the concentration difference between the donor and acceptor, in the taper region is obtained by four-point probe resistivity measurements. From the slope of the net carrier concentration versus the distance plot in the taper region, the initial phosphorus and boron concentration are calculated. Experimental data...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1984
ISBN-10: 0-8031-0403-0
ISBN: 978-0-8031-0403-7
...), and by Neutron Depth Profiling (NDP) is presented. The boron implantations were done at several fluences and energies into bare silicon and through several thicknesses of thermally grown oxides. Sources of error and their relation to observed differences among the techniques will be discussed. Boron depth...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1979
ISBN-10: 0-8031-0537-1
ISBN: 978-0-8031-0537-9
... coating, and the observed variations have been explained in terms of differences in weld metal composition arising from changes in the slag/metal reactions which occur during welding. Phosphorus and boron levels have also been investigated. Variations in the former have no effect on tensile properties...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1977
ISBN-10: 0-8031-0347-6
ISBN: 978-0-8031-0347-4
... A comparison has been made between the wearout rates of [0/± 45/0] boron/epoxy and boron/aluminum composites in low-cycle fatigue at 295 and 76 K. Using degradation of modulus as the wearout criterion, these preliminary data indicate that cryogenic temperatures have a negligible effect on either...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1977
ISBN-10: 0-8031-4490-3
ISBN: 978-0-8031-4490-3
... A method of measuring the longitudinal residual stress distribution in boron fibers is presented. The residual stresses in commercial chemical vapor deposited boron on tungsten fibers of 102, 142, and 203 µm (4, 5.6, and 8 mil) diameters were determined. Results for the three sizes show...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1977
ISBN-10: 0-8031-4490-3
ISBN: 978-0-8031-4490-3
... Three boron/aluminum aft pylon “boat tail” skins were designed, fabricated, and installed on three DC-10 aircraft for a five-year flight service demonstration test. Inspection and tests of the skins will establish the ability of the composite to withstand long-time flight service exposures...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1977
ISBN-10: 0-8031-4490-3
ISBN: 978-0-8031-4490-3
... Flexural stress relaxation (FSR) and flexural internal friction (FIF) techniques were employed to measure the time-dependent deformation of boron fibers from −190 to 800°C. The principal specimens were 203-μm (8 mil) diameter fibers commercially produced by chemical vapor deposition (CVD...