منابع مشابه
High Temperature Materials for Gas Turbines: The Present and Future
Increased operating temperatures and higher efficiency in gas turbines and jet engines can reduce CO2 emission, thus contributing to the prevention of global warming. To achieve this goal, it is essential to improve the properties of high temperature materials. Various Ni-base superalloys are used for high-temperature components, e.g., combustors and high-pressure turbine blades and vanes, that...
متن کاملHIGH TEMPERATURE ELASTIC PROPERTIES OF REFRACTORY MATERIALS
Abstract: A pulse-echo technique, based on ultrasonic "long-bar" mode (LBM) velocity measurements, working up to 1700°C is described. Magnetostrictive transducers and ultrasonic lines used in a 40-85 kHz frequency range are detailed. The conditions of choice of fundamental parameters (frequency, line geometry, sample size) are discussed in relation with the nature and the microstructure of ...
متن کاملConsiderations of Well Cementing Materials in High-Pressure, High-Temperature Conditions (RESEARCH NOTE)
As worldwide demand of hydrocarbon is growing fast, the oil and gas companies have been forced to explore reservoirs with more hostile conditions, such as high-pressure, high-temperature conditions. Improved technology, material selection and testing procedures are required to overcome the common problems in these conditions. One of the main phases of well construction is cementing job. Appropr...
متن کاملHigh Temperature Gas Chromatography
Gas chromatography (GC) is generally believed to be restricted to the analysis of ‘volatiles’ and is less applicable to the analysis of so-called ‘heavy’ compounds. The introduction of persilylated glass and fused silicea columns, of thermostable stationary phases and of non-discriminative injection devices in capillary GC (CGC) have made the deRnitions of ‘volatile’ and ‘heavy’ very Sexible. H...
متن کاملHot Corrosion in Gas Turbines
DURING COMBUSTION in the gas turbine, sulfur from the fuel reacts with sodium chloride from ingested air at elevated temperatures to form sodium sulfate. The sodium sulfate then deposits on the hot-section components, such as nozzle guide vanes and rotor blades, resulting in accelerated oxidation (or sulfidation) attack. This is commonly referred to as “hot corrosion.” Sulfur in the fuel is gen...
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ژورنال
عنوان ژورنال: Journal of Engineering Materials and Technology
سال: 1975
ISSN: 0094-4289,1528-8889
DOI: 10.1115/1.3443268