Physical Properties of Selected Silicates for a Long-Term Heat Container

2018 ◽  
Vol 276 ◽  
pp. 154-159
Author(s):  
Stanislav Šťastník ◽  
Jiří Vala ◽  
František Šot
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
High Heat ◽  
Thermal Source ◽  
Temperature Changes ◽  
Measurement Methodology ◽  
Wire Method ◽  
High Heat Capacity ◽  
Basic Prerequisite

Implementation of high temperature solar reservoirs is associated with problems related to the physical properties of materials, especially with temperature resistance of the material at temperature changes, with high heat capacity, with high thermal conductivity and with material fire resistance. In the case of silicate materials, more specific materials with favourable physical properties are available, which can be used for the construction of high temperature containers. The basic prerequisite for designing such container is the knowledge of the physical properties of the heat storage core and the thermal insulation ability of container cladding layers.The paper deals with the problem of identification of material properties of silicates in the wide temperature range up to 800 °C, using the standard measurement methodology, improved by additional temperature recording at a defined distance from the thermal source during the dynamic thermal development of the linear thermal source, well-known as the hot wire method.

KUBOTA KNC-03

Alloy Digest ◽  
2010 ◽  
Vol 59 (1) ◽  
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Temperature Performance ◽  
Resistance To Oxidation

Abstract Kubota KNC-03 is a grade with a combination of high strength and excellent resistance to oxidation. These properties make this alloy suitable for long-term service at temperature up to 1250 deg C (2282 deg F). This datasheet provides information on physical properties, hardness, elasticity, tensile properties, and compressive strength as well as creep. It also includes information on high temperature performance as well as casting and joining. Filing Code: Ni-676. Producer or source: Kubota Metal Corporation, Fahramet Division. See also Alloy Digest Ni-662, April 2008.

CRUCIBLE 309

Alloy Digest ◽  
1982 ◽  
Vol 31 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
High Heat ◽  
Nickel Steel ◽  
Annealed Condition ◽  
Temperature Performance ◽  
Cold Worked ◽  
Specialty Metals

Abstract CRUCIBLE 309 is a non-hardenable austenitic chromium-nickel steel that has high heat-resisting characteristics. In the annealed condition it is non-magnetic or magnetic, depending on the composition. When cold worked it is very slightly magnetic. Typical applications include aircraft heaters and sulfite liquor handling equipment. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance as well as heat treating, machining, and joining. Filing Code: SS-405. Producer or source: Crucible Specialty Metals Division, Colt Industries.

THERMOLD H22

Alloy Digest ◽  
1965 ◽  
Vol 14 (10) ◽  
Keyword(s):  
High Temperature ◽  
Heat Resistance ◽  
Physical Properties ◽  
Abrasion Resistance ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
High Heat ◽  
High Heat Resistance ◽  
Temperature Performance ◽  
High Degree

Abstract THERMOLD H22 is a tungsten-type hot work steel possessing high heat resistance and a high degree of working hardness at elevated temperatures. It is recommended where hardness and abrasion resistance are more important than toughness. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-170. Producer or source: Cyclops Corporation.

KENTANIUM K162B

Alloy Digest ◽  
1962 ◽  
Vol 11 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Titanium Carbide ◽  
Physical Properties ◽  
Abrasion Resistance ◽  
High Hardness ◽  
High Heat ◽  
Temperature Performance

Abstract Kentanium K162B is a titanium carbide cermet having high heat and oxidation resistance along with high hardness and abrasion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness, creep, and fatigue. It also includes information on high temperature performance and corrosion resistance as well as machining and joining. Filing Code: Ti-33. Producer or source: Kennametal Inc..

TIMETAL 6-2-4-2

Alloy Digest ◽  
2007 ◽  
Vol 56 (6) ◽  
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Creep Strength ◽  
Temperature Stability ◽  
Heat Treating ◽  
High Temperature Stability ◽  
Temperature Performance

Abstract Timetal 6-2-4-2 has a combination of tensile strength, creep strength, toughness, and high-temperature stability for long-term application at temperatures up to 538 deg C (1000 deg F). This datasheet provides information on composition, physical properties, microstructure, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, and joining. Filing Code: TI-140. Producer or source: Timet.

KUBOTA ALLOY HN

Alloy Digest ◽  
2010 ◽  
Vol 59 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Temperature Performance ◽  
Term Creep ◽  
Rupture Properties ◽  
Better Than

Abstract Kubota alloy HN is an austenitic Fe-Ni-Cr alloy with long-term creep-rupture properties that are intermediate between those of HK40 and HP40 alloys. Carburization resistance is better than that of HK40, but oxidation resistance is generally lower, making the alloy suitable for long service at 1095 deg C (2000 deg F). This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as casting, machining, and joining. Filing Code: SS-1060. Producer or source: Kubota Metal Corporation, Fahramet Division.

Investigation of long-term aging of high-temperature Nb-matrix composite material reinforced by α-Al2O3 fibers

2021 ◽  
Vol 5 ◽  
pp. 28-38
Author(s):  
B. V. Shchetanov ◽  
◽  
D. V. Graschenkov ◽  
R. M. Dvoretskov ◽  
A. N. Bol’shakova ◽  
...  
Keyword(s):  
High Temperature ◽  
Interphase Boundary ◽  
Bending Strength ◽  
High Heat ◽  
Original Sample ◽  
Initial Sample ◽  
Average Hardness ◽  
Crystal Fibers ◽  
Α Al2o3

Solving the problems when developing high-temperature composite materials (HTCM) requires non-standard approaches, as for example, using the long-term high-heat treatment (HHT), which has a significant effect on mechanical properties of the HTCM at high temperatures. To obtain a niobium-based HTCM reinforced with α-Al2O3 single crystal fibers (“Nb – SCF α-Al2O3”) hot pressing technique was used in the research. The HHT effect at 1350 °C of the HTCM on its high-temperature (1300 °C) bending strength, hardness and density at 22 °C after 100 hours HHT with a step in 25 hours was investigated. The samples structure and elements distribution at the interfacial boundaries of HTCMs were studied. It was established that the elements interdiffusion width at the interphase boundary of the continuous composition “Nb – SCF α-Al2O3” doesn’t exceed 2 μm for the whole HHT term; in outside the interphase boundary, only niobium oxides and carbides were detected. It was found that the bending strength after 25 hours HHT slightly exceeded the strength of the initial sample (before HHT); with further high-temperature HHT, the strength increased by 1.7 – 2 times in comparison with the initial sample. The hardness (HV 0.5) after 25 hours HHT remained actually unchanged (70), and subsequently sharply increased and the average hardness in three aging stages (50, 75 and 100 hours) was 330. The density of HTCMs increased with HHT, and after 100 hours HHT increased in comparison with the original sample by 1.3 times.

Carbonate Composite Catalyst with High-Temperature Thermal Storage for Use in Solar Tubular Reformers

2004 ◽  
Vol 127 (3) ◽  
pp. 396-400 ◽  
Author(s):  
Tsuyoshi Hatamachi ◽  
Tatsuya Kodama ◽  
Yuuki Isobe
Keyword(s):  
High Temperature ◽  
Thermal Storage ◽  
Chemical Conversion ◽  
High Heat ◽  
Composite Catalyst ◽  
Stable Operation ◽  
Cooling Mode ◽  
Co2 Reforming ◽  
High Heat Capacity ◽  
Laboratory Scale Reactor

The composite materials of Ni-applied, porous zirconia balls with molten Na2CO3 salt were examined for use in solar thermochemical reforming of methane as the catalyst with high-temperature thermal storage. The millimeter-sized composite balls were tested on the heat discharge property and the catalytic activity for CO2 reforming of methane in a laboratory-scale reactor. The high heat capacity and large latent heat (heat of solidification) of the composite molten salt circumvented the temperature dropping of the catalyst bed, which resulted in the alleviation of rapid decay in chemical conversion during cooling mode of the reactor. The composite catalyst is expected to realize stable operation in the solar reformer under fluctuation of insolation by a cloud passage.

Carbonate Composite Catalyst With High-Temperature Thermal Storage for Use in Solar Tubular Reformers

Solar Energy ◽  
2004 ◽  
Author(s):  
Tsuyoshi Hatamachi ◽  
Tatsuya Kodama ◽  
Yuuki Isobe
Keyword(s):  
High Temperature ◽  
Thermal Storage ◽  
Chemical Conversion ◽  
High Heat ◽  
Composite Catalyst ◽  
Stable Operation ◽  
Cooling Mode ◽  
Co2 Reforming ◽  
High Heat Capacity ◽  
Laboratory Scale Reactor

The composite materials of Ni-applied, porous zirconia balls with molten Na2CO3 salt were examined for use in solar thermochemical reforming of methane as the catalyst with high-temperature thermal storage. The millimeter-sized composite balls were tested on the heat discharge property and the catalytic activity for CO2 reforming of methane in a laboratory-scale reactor. The high heat capacity and large latent heat (heat of solidification) of the composite molten salt circumvented the temperature dropping of the catalyst bed, which resulted in the alleviation of rapid decay in chemical conversion during cooling mode of the reactor. The composite catalyst is expected to realize stable operation in the solar reformer under fluctuation of insolation by a cloud passage.

RA 333

Alloy Digest ◽  
1962 ◽  
Vol 11 (6) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Elevated Temperatures ◽  
High Strength ◽  
Heat Treating ◽  
High Heat ◽  
Temperature Performance

Abstract RA-333 is a high heat resisting alloy recommended for applications requiring high strength at elevated temperatures including the 1800-2200 F range. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-72. Producer or source: Rolled Alloys Inc..

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