A5087121890- Metallurgical Processes and Thermodynamics
- nanoparticles nucleation surface interactions
- Thermography and Photoacoustic Techniques
- High Temperature Alloys and Creep
- Solidification and crystal growth phenomena
- Intermetallics and Advanced Alloy Properties
- Aluminum Alloy Microstructure Properties
- Thermodynamic and Structural Properties of Metals and Alloys
- Calibration and Measurement Techniques
- Thermal properties of materials
- Nuclear reactor physics and engineering
- Nuclear Materials and Properties
- Scientific Measurement and Uncertainty Evaluation
- Advanced Sensor Technologies Research
- Spacecraft and Cryogenic Technologies
- Crystallization and Solubility Studies
- Titanium Alloys Microstructure and Properties
- Thermal and Kinetic Analysis
- Metallurgical and Alloy Processes
- Fusion materials and technologies
- Nuclear Physics and Applications
- Electronic Packaging and Soldering Technologies
- Rocket and propulsion systems research
- Advancements in Materials Engineering
- Mineral Processing and Grinding
National Physical Laboratory
1999-2021
Teddington Memorial Hospital
2007
Pratt & Whitney (United States)
2000
Whitney Museum of American Art
2000
Thermophysical properties for the solid and liquid phases of several Ni based superalloys (CMSX-4, CMSX-10, CM186LC, IN 738 Rene 80) have been measured. The following were measured: heat capacity enthalpy, thermal expansion coefficient density, diffusivity, viscosity surface tension. Analysis these measurements showed that γ′ phase (Ni 3 Al) affected values properties; C p , electrical resistivity, diffusivity conductivity. Relationships identified between content (which can be represented...
A “round robin” project has been carried out to determine the accuracy and reliability of various models used estimate viscosities industrial slags. The 21 participants were divided into measurement suppliers modelling participants. Reference materials issued check validity viscosity data supplied. base viscosity‐temperature‐composition was established for 8 different categories Chemical compositions predicted compared with calculated values. For mould fluxes, global % errors associated...
An oscillating viscometer with the following features has been successfully constructed: improved detection of logarithmic decay curve oscillation through introduction a system 40-diode array; use Roscoe equation to derive viscosities from curve; high-temperature two-zone furnace provide uniform temperature zone for temperatures up 1650 °C. Viscosity measurements have carried out on mercury, tin, aluminium, copper, nickel, and iron were in good agreement recommended values except case iron....
New metrological facilities for high temperature measurements of thermophysical properties have been recently developed by European National Metrology Institutes (NMIs). This work, performed in the framework joint research project "MetroFission", aims to provide reliable up 2000 materials having thermal similar those required design new generations fission reactors. will enable improve traceability International System Units (SI) nuclear laboratories. The validation these reference...
Methods for determining the various thermodynamic and kinetic parameters required modeling of γ′ precipitation in powder-metallurgy (PM), nickel-base superalloys are summarized. These comprise composition phase, solvus temperature/equilibrium approach curve, free energy (∆G*) associated with decomposition γ matrix to form γ′, γ/γ′ interfacial σ, an effective diffusivity use nucleation, growth, coarsening calculations. Techniques obtain material data include phase extraction (for average γ′)...
Measurements of the enthalpy (H T - H 2 5 C ) titanium alloy Ti-6Al-4V were made with use a differential power-scanning calorimeter, temperature-scanning and levitated-drop calorimeter in temperature range 25 to 1900°C. Some features are also given. The data compared thermodynamic calculations MTDATA, microsecond millisecond measurements by other workers. Agreement between at high temperatures is within 5%. solidification was calculated be 1675 1689 °C, due 295 ′ 15 J g 1 .
Abstract : This paper discusses the testing of an Advanced Liquid Hydrogen Turbopump for a 50,000 pound (222.4 kN) thrust Upper Stage Expander Cycle Engine being developed by Pratt & Whitney Space Propulsion under contract to United States Air Force Research Laboratory (AFRL) support Integrated High Payoff Rocket Technology (IHPRPT) program. The (ALH) is designed provide improved system weight decreased hardware/support costs, and increased reliability. These benefits will be demonstrated...