Search Results - "Steigerwald, Thomas G."

Solubility and dissolution kinetics of GaN in supercritical ammonia in presence of ammonoacidic and ammonobasic mineralizers by Schimmel, Saskia, Koch, Martina, Macher, Philipp, Kimmel, Anna-Carina L., Steigerwald, Thomas G., Alt, Nicolas S.A., Schlücker, Eberhard, Wellmann, Peter

“…•Solubility and dissolution kinetics of GaN under ammonoacidic and -basic conditions.•Results suggest a significant refinement of raw gravimetric literature…”
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In situ investigation of decomposing ammonia and ammonobasic solutions under supercritical conditions via UV/vis and Raman Spectroscopy by Steigerwald, Thomas G., Balouschek, Johannes, Hertweck, Benjamin, Kimmel, Anna-Carina L., Alt, Nicolas S.A., Schluecker, Eberhard

“…[Display omitted] •Visualization of temperature dependence of NH3 decomposing to N2 and H2.•Maximum temperature in the autoclave = 563 °C, at heating…”
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Chemical stability of carbon-based inorganic materials for in situ x-ray investigations of ammonothermal crystal growth of nitrides by Schimmel, Saskia, Künecke, Ulrike, Meisel, Magnus, Hertweck, Benjamin, Steigerwald, Thomas G., Nebel, Christoph, Alt, Nicolas S.A., Schlücker, Eberhard, Wellmann, Peter

“…The chemical stability of diamond, silicon carbide, vitreous carbon, and boron carbide in supercritical ammonia containing different mineralizers was…”
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Feasibility of density and viscosity measurements under ammonothermal conditions by Steigerwald, Thomas G., Alt, Nicolas S.A., Hertweck, Benjamin, Schluecker, Eberhard

“…With an eye on numerical simulations of ammonothermal growth of group III–V bulk single crystals, precise data for viscosity and density are strongly needed…”
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Flow Stability, Convective Heat Transfer and Chemical Reactions in Ammonothermal Autoclaves—Insights by In Situ Measurements of Fluid Temperatures by Schimmel, Saskia, Kobelt, Ines, Heinlein, Lukas, Kimmel, Anna-Carina L., Steigerwald, Thomas G., Schlücker, Eberhard, Wellmann, Peter

“…A variety of functional nitride materials, including the important wide bandgap semiconductor GaN, can be crystallized in exceptionally good structural quality…”
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Ceramic liner technology for ammonoacidic synthesis by Hertweck, Benjamin, Schimmel, Saskia, Steigerwald, Thomas G., Alt, Nicolas S.A., Wellmann, Peter J., Schluecker, Eberhard

“…•Corrosion behaviour of several ceramics under ammonothermal conditions.•Technical ceramics include: nitride and nitride bonded silicon carbide…”
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Solubility Studies of Sodium Azide in Liquid Ammonia by In Situ Ultrasonic Velocity Measurement by Baser, Hasan, Schwieger, Wilhelm, Freitag, Detlef, Steigerwald, Thomas G., Schluecker, Eberhard

“…Ultrasonic velocity measurement data has been established as a simple and convenient tool to determine different thermodynamic properties of liquids and…”
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High-temperature corrosion of Inconel®Alloy 718, Haynes®282®Alloy and CoWAlloy1&2 in supercritical ammonia/ammonium chloride solution by Kimmel, A.-C.L., Malkowski, Thomas F., Griffiths, Steven, Hertweck, Benjamin, Steigerwald, Thomas G., Freund, Lisa P., Neumeier, Steffen, Göken, Mathias, Speck, James S., Schluecker, Eberhard

“…•Detailed supercritical corrosion study under ammonoacidic conditions.•Comparison of Co-base and Ni-base superalloys under ammonoacidic conditions.•Mostly…”
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Different corrosion behaviour of autoclaves made of nickel base alloy 718 in ammonobasic and ammonoacidic environments by Hertweck, Benjamin, Steigerwald, Thomas G., Alt, Nicolas S.A., Schluecker, Eberhard

“…•Metallographic investigation of corrosion behaviour of ammonothermal autoclaves.•Ammonobasic conditions lead to formation of corrosion layer.•Ammonoacidic…”
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Electro Discharge Machining – A Suitable Fabrication Process for High‐Pressure/High‐Temperature Equipment by Hertweck, Benjamin, Kimmel, Anna-Carina L., Steigerwald, Thomas G., Alt, Nicolas S. A., Schlücker, Eberhard

“…Electro discharge machining (EDM) is an important manufacturing process for hard‐to‐cut materials like nickel‐based alloys, e.g., alloy 718. Its high yield…”
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Corrosive Degeneration of Autoclaves for the Ammonothermal Synthesis: Experimental Approach and First Results by Hertweck, Benjamin, Steigerwald, Thomas G., Alt, Nicolas S. A., Schluecker, Eberhard

“…The ammonothermal growth of different bulk group III nitride materials enables cost‐efficient production of high‐quality single crystals. Despite its…”
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Applicability of Metals as Liner Materials for Ammonoacidic Crystal Growth by Hertweck, Benjamin, Zhang, Shiyu, Steigerwald, Thomas G., Alt, Nicolas S. A., Niewa, Rainer, Schluecker, Eberhard

“…The ammonoacidic crystal growth allows industrial production of bulk semiconductor materials like gallium nitride as a widely known material for applications…”
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Determination of GaN solubility in supercritical ammonia with NH4F and NH4Cl mineralizer by in situ x-ray imaging of crystal dissolution by Schimmel, Saskia, Lindner, Michael, Steigerwald, Thomas G., Hertweck, Benjamin, Richter, Theresia M.M., Künecke, Ulrike, Alt, Nicolas S.A., Niewa, Rainer, Schlücker, Eberhard, Wellmann, Peter J.

“…Quantitative data on the solubility of GaN in supercritical ammonia using NH4F as mineralizer are reported. The solubility is determined by in situ x-ray…”
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Determination of GaN solubility in supercritical ammonia with NH sub(4)F and NH sub(4)Cl mineralizer by in situ x-ray imaging of crystal dissolution by Schimmel, Saskia, Lindner, Michael, Steigerwald, Thomas G, Hertweck, Benjamin, Richter, Theresia MM, Kunecke, Ulrike, Alt, Nicolas SA, Niewa, Rainer, Schlticker, Eberhard, Wellmann, Peter J

“…Quantitative data on the solubility of GaN in supercritical ammonia using NH sub(4)F as mineralizer are reported. The solubility is determined by in situ x-ray…”
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