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  • TEPCO : Press Release Report to Nuclear and Industrial ...

    We announce herewith that we reported to NISA about the cause of and countermeasures against the cracks which occurred on the tie rods of the hafnium flat tube control rods today. As a result of the investigation, we observed cracks either on the tie rods or the connecting points of sheathe and tie rods and concluded that those cracks were caused by the following respective reasons. ・Cracks ...

  • NRC: Information Notice No. 89-31: Swelling and Cracking ...

    22/05/2015  During thermal cycling, the differential thermal expansion between the Hafnium and the stainless steel cladding causes the particles to come in contact with the Hafnium and to penetrate or remove the protective oxide layer. After the oxide layer is penetrated, the diffusion of hydrogen into the Hafnium occurs. Because the Hafnium and the cladding have a constant interface at the bottom of

  • Tribological study of hafnium dioxide and aluminium oxide ...

    In the present work we studied the mechanical properties of hafnium dioxide (HfO 2) and aluminium oxide (Al 2 O 3) thin films deposited on glass at low temperature by means of atomic layer deposition method.The scratch resistance and tribological properties of HfO 2 and Al 2 O 3 were investigated. During scratch tests the first small cracks in the films were detected with a relatively low load ...

  • NRC Information Notice 1989-031: Swelling and Cracking of ...

    data from Union Electric Co.'s Callaway Plant and confirmed that Hafnium control rod swelling was also occurring at Callaway. In addition, there has been some foreign experience with these Hafnium control rods breaking due to either swelling or hydriding and fretting. Discussion: Westinghouse introduced Hafnium material in RCCAs as a replacement for silver-indium-cadmium (Ag-In-Cd) in the ...

  • ROLE OF HAFNIUM IN MODIFYING THE MICROSTRUCTURE

    N50230* -Metals, Ceramics, Other Materials-Metals Alloys-Properties, Structure Phase Studies; ALUMINIUM ALLOYS; CHROMIUM ALLOYS; HAFNIUM ADDITIONS; MICROSTRUCTURE; MOLYBDENUM ALLOYS; NICKEL BASE ALLOYS; NIOBIUM ALLOYS; TITANIUM ALLOYS; NICKEL ALLOYS AND SYSTEMS/Al-Cr-Mo-Nb-Ni-base-Ti, microstructure of 713-LC, effects of hafnium

  • Ultra-thin Hafnium doped ZnO films with enhanced optical ...

    6/02/2019  Ultra-thin Hafnium doped ZnO films were successfully prepared using the easy sol?gel dip coating technique. Novel optical and electrical properties were achieved for HZO thin film at room temperature. Hexagonal wurtzite crystal structure without any excess hafnium oxide peaks with a dominant peak of (002) plan was obtained for HZO (1 at%) sample. Results showed that 1 at% Hf

  • Alumina forming coatings containing hafnium for high ...

    23/11/1976  Both hafnium and yttrium have a greater affinity for oxygen than aluminum and it is believed that the oxygen which diffuses into the coating forms internal hafnium oxide particles extending from the surface oxide layer into the coating material. Microscopic examination of oxidized parts appears to confirm this theory. These hafnium oxide particles are believed to anchor or peg the alumina ...

  • US3993454A - Alumina forming coatings containing

    hafnium percent coating nickel hafnium oxide Prior art date 1975-06-23 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US05/589,654 Inventor Charles Stanley Giggins, Jr.

  • NATIONAL AERONAUTICS AND SPACE ADM INlSTRATlON

    tion and to crack formation. ABSTRACT OF THE DISCLOSURE . 3,337,337 3 bide contained 4.6 percent zirconium, titanium, and ... boride and hafnium carbide had greater stress-rupture lives than the composites containing the hafnium nitride 5 and tantalum carbide, the latter two composites exhibited better ductility. Specimens from billet 14 to 17 exhibited unusally low creep rates. The creep rate ...

  • Hafnium silicide target and manufacturing method for ...

    17/01/2006  Provided is a hafnium silicide target for forming a gate oxide film composed of HfSi 0.82-0.98, wherein the oxygen content is 500 to 10000 ppm.Manufactured is a hafnium silicide target for forming a gate oxide film, wherein powder of the composition composed of HfSi 0.82-0.98 is synthesized, pulverized to be 100 mesh or less, and thereafter subject to hot pressing or hot isostatic pressing ...

  • Fabrication of high-performance Y2O3 stabilized hafnium ...

    1. Introduction. Hafnium dioxide (HfO 2) is technologically important because of its low Young’s modulus, high melting point, high chemical stability under heat as well as its high neutron absorption cross section.HfO 2 resembles its twin oxide, zirconia (ZrO 2) in many physical and chemical properties .Compared with ZrO 2, HfO 2 shows higher melting point (2810 °C), lower volumetric change ...

  • Crusher Used For Uranium - simulationassuranceauto.be

    uganda jaw crusher equipment used in uranium mines for . jaw crusher equipment used in uranium mines. Uranium mine crusher for sale jaw crusher impact crusher cone crusher as is a major crushing equipment manufacturer in China we have design and small particles and they are widely used in the uranium ore fine crushing plant.

  • used machine shredder

    used Shredder, machines and plants for process engineering Spomasz RT 1 Pin mill. Used pin mill, made by Spomasz, type RT1. The RT1 disc sander is ideally suited for fine and very fine crushing of low moisture products, especially brittle ones, which do not cause frictional wear (up to a hardness of 3 according to the Mohs scale). Get price

  • Ultra-thin Hafnium doped ZnO films with enhanced optical ...

    6/02/2019  Ultra-thin Hafnium doped ZnO films were successfully prepared using the easy sol?gel dip coating technique. Novel optical and electrical properties were achieved for HZO thin film at room temperature. Hexagonal wurtzite crystal structure without any excess hafnium oxide peaks with a dominant peak of (002) plan was obtained for HZO (1 at%) sample. Results showed that 1 at% Hf

  • NATIONAL AERONAUTICS AND SPACE ADM INlSTRATlON

    tion and to crack formation. ABSTRACT OF THE DISCLOSURE . 3,337,337 3 bide contained 4.6 percent zirconium, titanium, and ... boride and hafnium carbide had greater stress-rupture lives than the composites containing the hafnium nitride 5 and tantalum carbide, the latter two composites exhibited better ductility. Specimens from billet 14 to 17 exhibited unusally low creep rates. The creep rate ...

  • Solid Solution Synthesis of Tantalum Carbide-Hafnium ...

    After hafnium carbide has been oxidized at temperatures in the range of 1400° to 2060°C, three distinct layers are present in the film cross section: (a) a residual carbide layer with dissolved ...

  • US3993454A - Alumina forming coatings containing

    hafnium percent coating nickel hafnium oxide Prior art date 1975-06-23 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US05/589,654 Inventor Charles Stanley Giggins, Jr.

  • Hafnium silicide target and manufacturing method for ...

    17/01/2006  Provided is a hafnium silicide target for forming a gate oxide film composed of HfSi 0.82-0.98, wherein the oxygen content is 500 to 10000 ppm.Manufactured is a hafnium silicide target for forming a gate oxide film, wherein powder of the composition composed of HfSi 0.82-0.98 is synthesized, pulverized to be 100 mesh or less, and thereafter subject to hot pressing or hot isostatic pressing ...

  • Interaction of High Temperature Strength and Weldability

    As a further confirmation, under­ bead cracking was produced in a plate weld in FS-85. FS-85 is a high creep strength columbium-base alloy (Cb-27Ta-10W-1Zr) having metal­ lurgical characteristics similar to T-111, with zirconium replacing hafnium as the reactive metal addition. The prediction and confirmation of under­ bea cracking in FS-85 ...

  • Surface hafnium-titanium compound coated hard alloy ...

    28/04/1981  Surface hafnium-titanium compound coated hard alloy material and method of producing the same ... Various countermeasures have been proposed to overcome this problem. For instance, Japanese Laid-open Publication No. 60808/1978 proposes to interpose an intermediate layer of titanium oxycarbide TiC.O between the TiC and Al 2 O 3 layers. Meanwhile, Japanese Patent Laid-open

  • used machine shredder

    used Shredder, machines and plants for process engineering Spomasz RT 1 Pin mill. Used pin mill, made by Spomasz, type RT1. The RT1 disc sander is ideally suited for fine and very fine crushing of low moisture products, especially brittle ones, which do not cause frictional wear (up to a hardness of 3 according to the Mohs scale). Get price

  • Crusher Used For Uranium - simulationassuranceauto.be

    uganda jaw crusher equipment used in uranium mines for . jaw crusher equipment used in uranium mines. Uranium mine crusher for sale jaw crusher impact crusher cone crusher as is a major crushing equipment manufacturer in China we have design and small particles and they are widely used in the uranium ore fine crushing plant.

  • US3993454A - Alumina forming coatings containing

    hafnium percent coating nickel hafnium oxide Prior art date 1975-06-23 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US05/589,654 Inventor Charles Stanley Giggins, Jr.

  • Que es cold crushing strength iron ore

    Aggregate Crushing Eperiment Values Mining Equipment. 2019-9-25 Zinc Ore Crushing Plant And Production Line For Sale In Peru Mineral processing equipment,mineralgold silver copper iron gold mine Silver Lead Zinc Ore Processing Method using Flotation Mining Crusher Plant For Sale,crushing equipment Plants in Peru; Silver ore crusher Get Price Used. stone jaw crusher machine price 1. read

  • Dac Emp 2ss Power Meat Grinder

    dac meatgrinder parts breughelsausages.be. electric meat grinders by dac emp 2ss– Rock Crusher Mill electric meat grinders by dac emp 2ss is a leading global manufacturer of crushing and milling equipment (electric meat grinders by dac emp 2ss), also supply individual (electric meat grinders by dac emp 2ss) crushers and mills as well as spare parts of them. read more

  • NATIONAL AERONAUTICS AND SPACE ADM INlSTRATlON

    tion and to crack formation. ABSTRACT OF THE DISCLOSURE . 3,337,337 3 bide contained 4.6 percent zirconium, titanium, and ... boride and hafnium carbide had greater stress-rupture lives than the composites containing the hafnium nitride 5 and tantalum carbide, the latter two composites exhibited better ductility. Specimens from billet 14 to 17 exhibited unusally low creep rates. The creep rate ...

  • US20080157157A1 - Semiconductor integrated circuit

    A DRAM capacitor uses ruthenium or ruthenium oxide as an upper electrode and hafnium dioxide or zirconium oxide as an insulation layer. The DRAM capacitor is intended to suppress diffusion of ruthenium, etc. into hafnium dioxide. Tantalum pentoxide or niobium oxide having a higher permittivity than that of the insulation layer is inserted as a cap insulation layer to the boundary between the ...

  • 10.1016/0892-6875(94)00112-P DeepDyve

    11/06/2020  Hafnium hydroxide filter cake and ammonium sulfate are being recovered from slurry using an expression (membrane) filter press. The process cycle time is approximately 6 hours. Each cycle produces 150 kg of cake containing 75 kg of hafnium oxide. The hafnium hydroxide filter cake has a 4 X 10y Pa-specific cake resistance of 1013 m/kg and is highly compressible. Washing the cake requires

  • Surface hafnium-titanium compound coated hard alloy ...

    28/04/1981  Surface hafnium-titanium compound coated hard alloy material and method of producing the same ... Various countermeasures have been proposed to overcome this problem. For instance, Japanese Laid-open Publication No. 60808/1978 proposes to interpose an intermediate layer of titanium oxycarbide TiC.O between the TiC and Al 2 O 3 layers. Meanwhile, Japanese Patent Laid-open

  • Interaction of High Temperature Strength and Weldability

    As a further confirmation, under­ bead cracking was produced in a plate weld in FS-85. FS-85 is a high creep strength columbium-base alloy (Cb-27Ta-10W-1Zr) having metal­ lurgical characteristics similar to T-111, with zirconium replacing hafnium as the reactive metal addition. The prediction and confirmation of under­ bea cracking in FS-85 ...

  • Crusher Used For Uranium - simulationassuranceauto.be

    uganda jaw crusher equipment used in uranium mines for . jaw crusher equipment used in uranium mines. Uranium mine crusher for sale jaw crusher impact crusher cone crusher as is a major crushing equipment manufacturer in China we have design and small particles and they are widely used in the uranium ore fine crushing plant.

  • used machine shredder

    used Shredder, machines and plants for process engineering Spomasz RT 1 Pin mill. Used pin mill, made by Spomasz, type RT1. The RT1 disc sander is ideally suited for fine and very fine crushing of low moisture products, especially brittle ones, which do not cause frictional wear (up to a hardness of 3 according to the Mohs scale). Get price

  • Dac Emp 2ss Power Meat Grinder

    dac meatgrinder parts breughelsausages.be. electric meat grinders by dac emp 2ss– Rock Crusher Mill electric meat grinders by dac emp 2ss is a leading global manufacturer of crushing and milling equipment (electric meat grinders by dac emp 2ss), also supply individual (electric meat grinders by dac emp 2ss) crushers and mills as well as spare parts of them. read more

  • Que es cold crushing strength iron ore

    Aggregate Crushing Eperiment Values Mining Equipment. 2019-9-25 Zinc Ore Crushing Plant And Production Line For Sale In Peru Mineral processing equipment,mineralgold silver copper iron gold mine Silver Lead Zinc Ore Processing Method using Flotation Mining Crusher Plant For Sale,crushing equipment Plants in Peru; Silver ore crusher Get Price Used. stone jaw crusher machine price 1. read

  • US20080157157A1 - Semiconductor integrated circuit

    A DRAM capacitor uses ruthenium or ruthenium oxide as an upper electrode and hafnium dioxide or zirconium oxide as an insulation layer. The DRAM capacitor is intended to suppress diffusion of ruthenium, etc. into hafnium dioxide. Tantalum pentoxide or niobium oxide having a higher permittivity than that of the insulation layer is inserted as a cap insulation layer to the boundary between the ...

  • Experiments display dramatic build up in photo voltaic ...

    7/07/2019  What that paintings confirmed, Van Voorhis says, is that the important thing to those calories transfers lies within the very floor of the fabric, now not in its bulk. “So it used to be transparent that the skin chemistry on silicon used to be going to be vital. That used to be what used to be going to resolve what forms of floor states there have been.” That target the skin chemistry will ...

  • When Did Plate Tectonics Begin? Theory of Plate ...

    27/06/2012  The hafnium patterns in the older rocks, those that are more than 3.2 billion years old, are different from the patterns in younger rocks, Naeraa found. Plumes before subduction

  • US20060042544A1 - Film formation apparatus and method

    A film formation apparatus for a semiconductor process includes a cleaning gas supply circuit, a concentration measuring section, and an information processor. The cleaning gas supply circuit is configured to supply a cleaning gas into a reaction chamber to perform cleaning of removing from an inner surface of the reaction chamber a by-product film derived from a film formation gas.

  • FINAL SAFETY EVALUATION BY THE OFFICE OF NUCLEAR

    uses an all B4C capsule design, the Marathon-Ultra design incorporates full-length hafnium rods in outer edge, high-depletion tube locations. The outer structure of the control rod, consisting of the handle, absorber tubes, tie rod, and velocity limiter, is identical to the Marathon-5S design.

  • The High-k Solution

    The transistors, with a hafnium-based oxide and metal gate electrodes, had everything we needed: they turned on at the right voltage, leaked little current through the gate oxide, and passed a ...