Search Results - "Fahrenholtz, W G"

Pressureless Densification of Zirconium Diboride with Boron Carbide Additions by Zhang, S. C., Hilmas, G. E., Fahrenholtz, W. G.

“…Zirconium diboride (ZrB2) was densified (>98% relative density) at temperatures as low as 1850°C by pressureless sintering. Sintering was activated by removing…”
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Processing and characterization of ZrB2-based ultra-high temperature monolithic and fibrous monolithic ceramics by FAHRENHOLTZ, W. G, HILMAS, G. E, CHAMBERLAIN, A. L, ZIMMERMANN, J. W

“…Zirconium diboride (ZrB2) based ultra-high temperature ceramics either unmodified or with SiC particulate additions of 10, 20, or 30 volume percent were…”
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Zirconium Carbide-Tungsten Cermets Prepared by In Situ Reaction Sintering by Zhang, S. C., Hilmas, G. E., Fahrenholtz, W. G.

“…Zirconium carbide–tungsten (ZrC–W) cermets were prepared by a novel in situ reaction sintering process. Compacted stoichiometric zirconium oxide (ZrO2) and…”
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Effects of temperature and the incorporation of W on the oxidation of ZrB2 ceramics by Kazemzadeh Dehdashti, M., Fahrenholtz, W.G., Hilmas, G.E.

“…•The oxidation behavior of ZrB2 with 0, 4, 6, or 8mol% W was studied at 800–1600°C.•The stability of the glassy layers were higher for (Zr,W)B2 specimens.•The…”
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Reactive hot pressing of Al2O3-Ni composites by FAHRENHOLTZ, W. G

“…Reactive hot pressing has been used to form Al2O3-Ni composites from Al and NiO. The effect of attrition milling on the precursor powder and subsequent…”
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Densification of ultra-refractory transition metal diboride ceramics by Fahrenholtz, W.G., Hilmas, G.E., Li, Ruixing

“…The densification behavior of transition metal diboride compounds was reviewed with emphasis on ZrB2 and HfB2. These compounds are considered ultra-high…”
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The ZrB2 Volatility Diagram by Fahrenholtz, William G.

“…A volatility diagram was calculated for temperatures of 1000, 1800, and 2500 K to understand the oxidation of ZrB2. Applying the diagram, it can be seen that…”
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High-Strength Zirconium Diboride-Based Ceramics by Chamberlain, Adam L., Fahrenholtz, William G., Hilmas, Gregory E., Ellerby, Donald T.

“…Zirconium diboride (ZrB2) and ZrB2 ceramics containing 10, 20, and 30 vol% SiC particulates were prepared from commercially available powders by hot pressing…”
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Pressureless Sintering of Zirconium Diboride by Chamberlain, Adam L., Fahrenholtz, William G., Hilmas, Gregory E.

“…Zirconium diboride (ZrB2) ceramics were sintered to a relative density of ∼98% without applied external pressure. Densification studies were performed in the…”
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Transmission electron microscopy study of interfacial microstructure formed by reacting Al–Mg alloy with mullite at high temperature by Lu, P, Loehman, R.E, Ewsuk, K.G, Fahrenholtz, W.G

“…Transmission electron microscopy (TEM) has been used to study the interfacial microstructure formed by reacting Al–Mg alloy with mullite (Al 6Si 2O 13) at high…”
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Thermal decomposition behavior of praseodymium oxides, hydroxides, and carbonates by Treu, B. L., Fahrenholtz, W. G., O’Keefe, M. J.

“…Thermal decomposition behavior was studied for Pr 6 O 11 , Pr 2 O 3 , Pr(OH 3 ), and Pr 2 (CO 3 ) 3 · x H 2 O. In the course of transformation, the…”
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Kinetics of Ceramic-Metal Composite Formation by Reactive Metal Penetration by Fahrenholtz, William G., Ewsuk, Kevin G., Loehman, Ronald E., Lu, Ping

“…The rate of composite formation via reactive metal penetration has been determined. The metal penetration depth (i.e., the reaction‐layer thickness) was…”
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Characterization of cerium-based conversion coatings for corrosion protection of aluminum alloys by Fahrenholtz, William G., O'Keefe, Matthew J., Zhou, Haifeng, Grant, J.T.

“…Cerium-based conversion coatings were formed by a spontaneous reaction between a water-based solution containing CeCl 3 and aluminum alloy 7075-T6 substrates…”
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Deposition and characterization of cerium oxide conversion coatings on aluminum alloy 7075-T6 by Rivera, Berny F., Johnson, Benedict Y., O'Keefe, Matthew J., Fahrenholtz, William G.

“…An improved process has been developed for the spontaneous deposition of cerium oxide conversion coatings for corrosion protection of aluminum alloy 7075-T6…”
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Reactive Processing in Ceramic-Based Systems by Fahrenholtz, William G.

“…Reactive hot pressing is discussed as a processing method to form ceramic‐based materials. Fundamental aspects of thermodynamics such as favorable Gibbs'‐free…”
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Microstructure and composition of Al-Al2O3 composites made by reactive metal penetration by GAO, Y, JIA, J, LOEHMAN, R. E, EWSUK, K. G, FAHRENHOLTZ, W. G

“…The microstructure of Al-Al2O3 composites made by reactive penetration of Al (or Al alloy) into ceramic (mullite or kaolin) preforms has been investigated…”
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Interfacial microstructure formed by reactive metal penetration of Al into mullite by Lu, P., Du, T. B., Loehman, R. E., Ewsuk, K. G., Fahrenholtz, W. G.

“…Microstructures in the reaction interface between molten Al and dense mullite have been studied by transmission electron microscopy to provide insight into…”
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Thermodynamic Analysis of ZrB2-SiC Oxidation: Formation of a SiC-Depleted Region by Fahrenholtz, William G.

“…A thermodynamic model was developed to explain the formation of a SiC‐depleted layer during ZrB2–SiC oxidation in air at 1500°C. The proposed model suggests…”
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Effects of transition metals on the oxidation behavior of ZrB2 ceramics by Kazemzadeh Dehdashti, M., Fahrenholtz, W.G., Hilmas, G.E.

“…•Oxidation behavior was studied for ZrB2 and ZrB2 with 4mol% W, Mo, or Nb 1600°C.•Initially, the surface of the ZrB2 specimens were covered by a glassy…”
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Mechanical behavior of zirconium diboride–silicon carbide ceramics at elevated temperature in air by Neuman, Eric W., Hilmas, Gregory E., Fahrenholtz, William G.

“…The mechanical properties of zirconium diboride–silicon carbide (ZrB2–SiC) ceramics were characterized from room temperature up to 1600°C in air. ZrB2…”
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