A nanocomposite material that can withstand prolonged contact with molten glass and glass precursor melts may include a cermet substrate and a glass reaction material overlying the cermet substrate. The cermet substrate may include a refractory metal matrix and ceramic particles embedded in the refractory metal matrix, and the glass reaction material may be the reaction product of molten glass and the cermet substrate in an inert environment. The nanocomposite material can be used to construct any kind of structure, such as an impeller or a vessel liner, that may be exposed to molten glass or glass precursor melts.

A powder metal compact is disclosed. The powder metal compact includes a cellular nanomatrix comprising a nanomatrix material. The powder metal compact also includes a plurality of dispersed particles comprising a particle core material that comprises an MgZr, MgZnZr, MgAlZnMn, MgZnCuMn or MgW alloy, or a combination thereof, dispersed in the cellular nanomatrix.

High temperature rolling element bearings and methods for manufacturing high temperature bearing components, such as bearing races or rings, are provided. In one embodiment, the method includes obtaining a powder mixture containing a superalloy powder admixed with hard wear particles, such as carbide particles. The powder mixture is consolidated utilizing a spark plasma sintering process during which the powder mixture is compressed into a sintered blank, while an electrical current is conducted through the powder mixture to heat the powder mixture to a sintering temperature. The sintered blank is then machined to impart the bearing component with its final shape. Precipitate hardening may also be performed, if desired. The spark plasma sintering process is controlled to limit the temperature and duration of the powder consolidation process thereby imparting the resulting bearing component with an enhanced hot hardness and other desirable properties at highly elevated operating temperatures.

High temperature rolling element bearings and methods for manufacturing high temperature bearing components, such as bearing races or rings, are provided. In one embodiment, the method includes obtaining a powder mixture containing a superalloy powder admixed with hard wear particles, such as carbide particles. The powder mixture is consolidated utilizing a spark plasma sintering process during which the powder mixture is compressed into a sintered blank, while an electrical current is conducted through the powder mixture to heat the powder mixture to a sintering temperature. The sintered blank is then machined to impart the bearing component with its final shape. Precipitate hardening may also be performed, if desired. The spark plasma sintering process is controlled to limit the temperature and duration of the powder consolidation process thereby imparting the resulting bearing component with an enhanced hot hardness and other desirable properties at highly elevated operating temperatures.

A sintered alloy is produced from mixed powder containing first hard particles, second hard particles, graphite particles, and iron particles. The first hard particles are FeMoNiCoMnSiC-based alloy particles, the second hard particles are FeMoSi-based alloy particles, the mixed powder contains 5 to 50 mass % of the first hard particles, 1 to 8 mass % of the second hard particles, and 0.5 to 1.5 mass % of the graphite particles, when total mass of the first hard particles, the second hard particles, the graphite particles, and the iron particles is set as 100 mass %.

Disclosed herein, in certain embodiments, are composite materials, methods, tools and abrasive materials comprising a tungsten-based metal composition and an alloy. In some cases, the composite materials or material are resistant to oxidation.

To provide a Nb-silicide based composite achieving both mechanical characteristics and toughness at high levels in an ultrahigh temperature region (1200 C. or more) as well as a high-temperature component and a high-temperature heat engine which employ the same. The Nb-silicide based composite according to the present invention includes 13 to 23 at % of Si, 2.0 to 10 at % of Cr, 5.0 to 23 at % of Ti, 0.0 to 6.0 at % of Al, 0.10 to 8.0 at % of Zr, 1.0 to 8.0 at % of Hf, 0.0 to 2.0 at % of W, 0.10 to 6.0 at % of Sn, 3.1 to 8.0 at % of Mo, 0.20 to 5.0 at % of B, and the balance being Nb and inevitable impurities.

High temperature rolling element bearings and methods for manufacturing high temperature bearing components, such as bearing races or rings, are provided. In one embodiment, the method includes obtaining a powder mixture containing a superalloy powder admixed with hard wear particles, such as carbide particles. The powder mixture is consolidated utilizing a spark plasma sintering process during which the powder mixture is compressed into a sintered blank, while an electrical current is conducted through the powder mixture to heat the powder mixture to a sintering temperature. The sintered blank is then machined to impart the bearing component with its final shape. Precipitate hardening may also be performed, if desired. The spark plasma sintering process is controlled to limit the temperature and duration of the powder consolidation process thereby imparting the resulting bearing component with an enhanced hot hardness and other desirable properties at highly elevated operating temperatures.

High temperature rolling element bearings and methods for manufacturing high temperature bearing components, such as bearing races or rings, are provided. In one embodiment, the method includes obtaining a powder mixture containing a superalloy powder admixed with hard wear particles, such as carbide particles. The powder mixture is consolidated utilizing a spark plasma sintering process during which the powder mixture is compressed into a sintered blank, while an electrical current is conducted through the powder mixture to heat the powder mixture to a sintering temperature. The sintered blank is then machined to impart the bearing component with its final shape. Precipitate hardening may also be performed, if desired. The spark plasma sintering process is controlled to limit the temperature and duration of the powder consolidation process thereby imparting the resulting bearing component with an enhanced hot hardness and other desirable properties at highly elevated operating temperatures.

A thermoelectric conversion element in which one end of an n-type thermoelectric conversion material and one end of a p-type thermoelectric conversion material are each bonded to a conductive substrate using a bonding agent, the n-type thermoelectric conversion material and the p-type thermoelectric conversion material being specific silicides, the bonding agent being a conductive paste containing conductive metals consisting of silver and at least one noble metal selected from the group consisting of gold, platinum, and palladium, as well as a thermoelectric conversion module comprising a plurality of these thermoelectric conversion elements and having a specific structure, achieve excellent thermoelectric conversion performance in an intermediate temperature range of room temperature to about 700 C., and performance degradation hardly occurs even when electric generation is repeated, making it possible to maintain the excellent performance over a long period of time.