摘要:
Disclosed herein is a method comprising reacting a metal borohydride with a metal chloride composition that comprises magnesium chloride in a solvent to form a reaction mixture; wherein either the metal borohydride, the metal chloride composition or both the metal borohydride and the metal chloride composition are soluble in the solvent and a formed metal chloride is insoluble in the solvent; removing the solvent from the reaction mixture to produce a borohydride complex; treating the borohydride complex to obtain magnesium borohydride; extracting magnesium borohydride solvate; and desolvating the magnesium borohydride solvate to form magnesium borohydride.
摘要:
Disclosed herein is a method for preparing magnesium borohydride. The method includes the step of reacting a metal borohydride with a metal salt composition in a solvent, to form a reaction mixture. The metal salt composition comprises at least one magnesium salt. The metal borohydride and the metal salt composition are insoluble in the solvent. The method further includes the step of grinding the reaction mixture to produce a composition that includes magnesium borohydride; and removing the solvent from the composition. Another embodiment of this invention relates to a new material. The material is an orthorhombic crystal phase of magnesium borohydride.
摘要:
A diffusion barrier coating includes, in an exemplary embodiment, a composition selected from the group consisting of a solid-solution alloy comprising rhenium and ruthenium wherein the ruthenium comprises about 50 atom % or less of the composition and where a total amount of rhenium and ruthenium is greater than 70 atom %; an intermetallic compound including at least one of Ru(TaAl) and Ru2TaAl, where Ru(TaAl) has a B2 structure and Ru2TaAl has a Heusler structure; and an oxide dispersed in a metallic matrix wherein greater than about 50 volume percent of the matrix comprises the oxide.
摘要:
An environmentally resistant coating comprising silicon, titanium, chromium, and a balance of niobium and molybdenum for turbine components formed from molybdenum silicide-based composites. The turbine component may further include a thermal barrier coating disposed upon an outer surface of the environmentally resistant coating comprising zirconia, stabilized zirconia, zircon, mullite, and combinations thereof. The molybdenum silicide-based composite turbine component coated with the environmentally resistant coating and thermal barrier coating is resistant to oxidation at temperatures in the range from about 2000° F. to about 2600° F. and to pesting at temperatures in the range from about 1000° F. to about 1800° F.
摘要:
Disclosed herein is a hydrogen storage material comprising a metal hydride and an organic hydrogen carrier. Also disclosed herein is a hydrogen storage/fuel cell system which employs the hydrogen storage material.
摘要:
A composition that includes a storage material is provided. The storage material includes at least one of AlLi, Al2Li3, Al4Li9, Al3Mg2, Al12Mg17, AlB12, Al4C3, AlTi2C, AlTi3C, AlZrC2, Al3Zr5C, Al3Zr2C4, Al3Zr2C7, AlB2, AlB12, AlSi, B6Ca, B6K, B12Li, B6Li, B4Li, B3Li, B2Li, BLi, B6Li7, BLi3, Ca2Si, CaSi, CaSi2, Ge4K, GeK, GeK3, GeLi3, Ge5Li22, Mg2Ge, Ge4Na, GeNa, GeNa3, KSi, KC4, K4Si23, K4C3, LiC, Li4C3, LiC6, Li22Si5, Li13Si4, Li7Si3, Li12Si7, MgB2, MgB4, MgB7, MgC2, Mg2C3, Mg2Si, NaB6, NaB15, NaB16, Na4C3, NaC4, NaSi, NaSi2, or Na4Si23. An article including the storage material, and a system including the article are also provided.
摘要:
A method for evaluating the thermal exposure of a selected metal component which has been exposed to changing temperature conditions is described. The voltage distribution on a surface of the metal component, or on a metallic layer which lies over the component, is first obtained. The voltage distribution usually results from a compositional change in the metal component. The voltage distribution is then compared to a thermal exposure-voltage model which expresses voltage distribution as a function of exposure time and exposure temperature for a reference standard corresponding to the metal component. In this manner, the thermal exposure of the selected component can be obtained. A related device for evaluating the thermal exposure of a selected metal component is also described.
摘要:
An apparatus, method, and material for storing and retrieving hydrogen are presented. The apparatus comprises a storage component, and this component comprises a hydrogen storage medium. The hydrogen storage medium comprises gallium. The method for storing and retrieving hydrogen comprises providing a source of hydrogen; providing a storage component, the component comprising a hydrogen storage medium, wherein the hydrogen storage medium comprises gallium; and exposing the medium to hydrogen from the source. The material comprises at least about 10 atom percent gallium, with the balance comprising at least one of aluminum and boron. The material is a metallic alloy.
摘要:
An article, such as an airfoil having a melting temperature of at least about 1500° C. and comprising a first piece and a second piece joined by a braze to the first piece. The first piece comprises one of a first niobium-based refractory metal intermetallic composite and a first molybdenum-based refractory metal intermetallic composite, and the second piece comprises one of a second niobium-based refractory metal intermetallic composite and a second molybdenum-based refractory metal intermetallic composite. The braze joining the first piece to the second piece comprises a first metallic element and a second metallic element, wherein the first metallic element is one of titanium, palladium, zirconium, niobium, and hafnium, and wherein the second metallic element is one of titanium, palladium, zirconium, niobium, hafnium, aluminum, chromium, vanadium, platinum, gold, iron, nickel, and cobalt, the first metallic element being different from the second metallic element. This abstract is submitted in compliance with 37 C.F.R. 1.72(b) with the understanding that it will not be used to interpret or limit the scope of or meaning of the claims.
摘要:
An alloy and repair material comprising the alloy, articles comprising the alloy and repair material, and methods for repairing articles including provision of the alloy as repair material are described, with the alloy comprising ruthenium, nickel, aluminum, and chromium, wherein a microstructure of the alloy is essentially free of an L12-structured phase at temperatures greater than about 1000° C. and comprises an A3-structured phase and up to about 40 volume percent of a B2-structured phase.