A porous metal structure and a preparation method for the same. The preparation method for the porous metal structure includes the following steps: performing first de-alloying treatment on an alloy foil to form pores, then performing reduction annealing treatment in a reducing gas atmosphere, and finally performing second de-alloying treatment to obtain the porous metal structure.

A porous metal structure and a preparation method for the same. The preparation method for the porous metal structure includes the following steps: performing first de-alloying treatment on an alloy foil to form pores, then performing reduction annealing treatment in a reducing gas atmosphere, and finally performing second de-alloying treatment to obtain the porous metal structure.

A method includes: providing a cold-rolled alloy foil material; carrying out recrystallization annealing treatment on the alloy foil material, and then carrying out first cooling treatment to obtain an alloy foil material having a first component phase; carrying out phase separation thermal treatment on the alloy foil material, and then carrying out second cooling treatment to separate out a second component phase and obtain an alloy foil material having both the first and second component phase, where the temperature of the phase separation thermal treatment is smaller than the temperature of the recrystallization annealing treatment, and an average cooling rate of the second cooling treatment is smaller than an average cooling rate of the first cooling treatment; and carrying out dealloying treatment on the alloy foil material, carrying out reduction annealing treatment in a reducing gas atmosphere, and carrying out third cooling treatment to obtain a porous metal structure.

A method includes: providing a cold-rolled alloy foil material; carrying out recrystallization annealing treatment on the alloy foil material, and then carrying out first cooling treatment to obtain an alloy foil material having a first component phase; carrying out phase separation thermal treatment on the alloy foil material, and then carrying out second cooling treatment to separate out a second component phase and obtain an alloy foil material having both the first and second component phase, where the temperature of the phase separation thermal treatment is smaller than the temperature of the recrystallization annealing treatment, and an average cooling rate of the second cooling treatment is smaller than an average cooling rate of the first cooling treatment; and carrying out dealloying treatment on the alloy foil material, carrying out reduction annealing treatment in a reducing gas atmosphere, and carrying out third cooling treatment to obtain a porous metal structure.

A method of modifying a microstructure of a titanium material can include providing a solid titanium material in an inert atmosphere, where the solid titanium material has an initial microstructure with an initial grain size and which is optionally anisotropic. The method can also include introducing hydrogen through a thermal process into the solid titanium material, resulting in a titanium alloy article having a refined microstructure that has a final grain size that is smaller than the initial grain size, or reduced anisotropy, or a combination thereof.

A method of modifying a microstructure of a titanium material can include providing a solid titanium material in an inert atmosphere, where the solid titanium material has an initial microstructure with an initial grain size and which is optionally anisotropic. The method can also include introducing hydrogen through a thermal process into the solid titanium material, resulting in a titanium alloy article having a refined microstructure that has a final grain size that is smaller than the initial grain size, or reduced anisotropy, or a combination thereof.

The present invention relates to a metal coil, in particular a tungsten coil. One aspect of the invention relates to a method of manufacturing said metal coil, a further aspect to the metal coil itself, and yet a further aspect to the use of the metal coil in a heat conduction vacuum gauge, a Pirani element, or as a glow filament.

The present invention relates to a metal coil, in particular a tungsten coil. One aspect of the invention relates to a method of manufacturing said metal coil, a further aspect to the metal coil itself, and yet a further aspect to the use of the metal coil in a heat conduction vacuum gauge, a Pirani element, or as a glow filament.

A tungsten wire according to an embodiment is a tungsten wire made of a W alloy containing rhenium, and includes a mixture on at least a part of a surface thereof, the mixture contains W, C, and O as constituent elements, and taking a radial cross-sectional thickness of the mixture as A mm and a diameter of the tungsten wire as B mm, an average value of a ratio A/B of A to B is 0.3% to 0.8%.

A tungsten wire according to an embodiment is a tungsten wire made of a W alloy containing rhenium, and includes a mixture on at least a part of a surface thereof, the mixture contains W, C, and O as constituent elements, and taking a radial cross-sectional thickness of the mixture as A mm and a diameter of the tungsten wire as B mm, an average value of a ratio A/B of A to B is 0.3% to 0.8%.