Abstract: A high strength and wear resistant multi-element copper alloy is disclosed. The multi-element copper alloy comprises: 80-90 atomic percent Cu, 0.1-4 atomic percent Al, 6-10 atomic percent Ni, 0.1-3 atomic percent Si, 0.1-2 atomic percent V and/or Nb, and 0.1-2 atomic percent M. Experimental data reveal that, after being applied with an aging treatment under 450 degrees Celsius for 50 hours, hardness and strength of the multi-element copper alloy are both significantly enhanced because of age hardening, and softening due to overaging is not observed on the multi-element copper alloy. Moreover, measurement data have indicated that, this novel multi-element copper alloy exhibits better wear resistance superior to that of the conventional copper alloys.

Abstract: A high strength and wear resistant multi-element copper alloy is disclosed. The multi-element copper alloy comprises: 80-90 atomic percent Cu, 0.1-4 atomic percent Al, 6-10 atomic percent Ni, 0.1-3 atomic percent Si, 0.1-2 atomic percent V and/or Nb, and 0.1-2 atomic percent M. Experimental data reveal that, after being applied with an aging treatment under 450 degrees Celsius for 50 hours, hardness and strength of the multi-element copper alloy are both significantly enhanced because of age hardening, and softening due to overaging is not observed on the multi-element copper alloy. Moreover, measurement data have indicated that, this novel multi-element copper alloy exhibits better wear resistance superior to that of the conventional copper alloys.

Abstract: A high hardness and temperature-resistant alloy is disclosed, and comprises 10-40 atomic percent Co, 30-56 atomic percent Cr, 10-40 atomic percent Ni, 6-13 atomic percent C, 0-8 atomic percent Mo, and 0-8 atomic percent W. Moreover, the elemental composition of the high hardness and temperature-resistant alloy can further comprise at least one additive element, such as Pb, Sn, Ge, Si, Zn, Sb, P, B, Mg, Mn, V, Nb, Ti, Zr, Y, La, Ce, Al, Ta, Cu, and Fe. Experimental data reveal that, the high hardness and temperature-resistant alloy can still show a property of hardness greater than HV100 in 900 degrees Celsius. Therefore, experimental data have proved that the high hardness and temperature-resistant alloy has a significant potential for applications in the manufacture of hot working die metals, components (e.g., turbine blade) for high temperature applications, and devices (e.g., aeroengine) for high temperature applications.

Abstract: A low modulus corrosion-resistant alloy is disclosed, and comprises five principal elements, wherein the five principal elements are Zr, Nb, Ti, Mo, and Sn. Experimental data reveal that, samples of the low modulus corrosion-resistant alloy all include following characteristics: hardness of at least 250 HV, Young's modulus less than 100 GPa, yield strength greater than 600 MPa, and critical pitting potential greater than 1.3V. As a result, experimental data have proved that this low modulus corrosion-resistant alloy has a significant potential for application in the manufacture of biomedical articles including medical devices and surgical implants. In addition, this low modulus corrosion-resistant alloy is also suitable for application in the manufacture of various industrially-producible articles, including springs, coils, wires, clamps, fasteners, blades, valves, elastic sheets, spectacle frames, sports equipment, and other high-strength low-modulus corrosion-resistant structural materials.

Abstract: A high chromium and silicon-rich corrosion resistant steel is disclosed, which comprises, in weight percent: 22-30% Cr, 2-10% Si, and the balance Fe and incidental impurities, of which a content amount of Cr and Si is less than 37%. Experimental data reveal that, samples of the high chromium and silicon-rich corrosion resistant steel all have a pitting potential greater than 0.8 V and a hardness in a range between HV170 and HV500 in the as-homogenized condition. As a result, experimental data have proved that the high chromium and silicon-rich corrosion resistant steel of the present invention can replace conventional stainless steels having poor pitting resistance like type 304 and type 316 L, and then be adopted for the applications of components and/or structural parts requiring high corrosion resistance.

Abstract: A high strength and corrosion resistant ferrochrome alloy bulk is disclosed, which comprises, in weight percent: 30-68% Cr, 1.5-8% Ni, 1.6-6% C, and the balance Fe and incidental impurities, of which a Fe/Ni ratio is in a range from 5 to 10 and a Cr/C ratio is in a range between 10 and 33. Experimental data reveal that, samples of the high strength and corrosion resistant ferrochrome alloy bulk all possess hardness above HV400 and excellent corrosion resistance due to the high content of Cr. As a result, experimental data have proved that the high-strength and corrosion-resistant ferrochrome alloy bulk of the present invention has a significant potential to replace conventional high-strength stainless steels, so as to be widely applied in various industrial fields, e.g., aviation, transportation, marine facility components, chemical equipment and pipe fittings, engine parts, turbine blades, valves, bearings, building materials, and so on.

Abstract: A high strength and wear resistant multi-element copper alloy is disclosed. The multi-element copper alloy comprises: 80-90 atomic percent Cu, 0.1-4 atomic percent Al, 6-10 atomic percent Ni, 0.1-3 atomic percent Si, 0.1-2 atomic percent V and/or Nb, and 0.1-2 atomic percent M. Experimental data reveal that, after being applied with an aging treatment under 450 degrees Celsius for 50 hours, hardness and strength of the multi-element copper alloy are both significantly enhanced because of age hardening, and softening due to overaging is not observed on the multi-element copper alloy. Moreover, measurement data have indicated that, this novel multi-element copper alloy exhibits better wear resistance superior to that of the conventional copper alloys.

Abstract: A high strength and low modulus alloy is disclosed, and comprises at least five principal elements and at least one additive element. The principal elements are Ti, Zr, Nb, Mo, and Sn, and the additive element(s) are V, W, Cr, and/or Hf. Particularly, a summation of numeric values of Ti and Zr in atomic percent is less than or equal to 85, and the additive elements have a total numeric value in atomic percent less than or equal to 4. Experimental data reveal that, samples of the high strength and low modulus alloy all have properties of yield strength greater than 600 MPa and Young's modulus less than 90 GPa. As a result, experimental data have proved that the high strength and low modulus alloy has a significant potential for applications in the manufacture of various industrial components and/or devices, medical devices, and surgical implants.

Abstract: A high strength and low modulus alloy is disclosed, and comprises at least five principal elements and at least one additive element. The principal elements are Ti, Zr, Nb, Mo, and Sn, and the additive element(s) are V, W, Cr, and/or Hf. Particularly, a summation of numeric values of Ti and Zr in atomic percent is less than or equal to 85, and the additive elements have a total numeric value in atomic percent less than or equal to 4. Experimental data reveal that, samples of the high strength and low modulus alloy all have properties of yield strength greater than 600 MPa and Young's modulus less than 90 GPa. As a result, experimental data have proved that the high strength and low modulus alloy has a significant potential for applications in the manufacture of various industrial components and/or devices, medical devices, and surgical implants.

Abstract: A low modulus corrosion-resistant alloy is disclosed, and comprises five principal elements, wherein the five principal elements are Zr, Nb, Ti, Mo, and Sn. Experimental data reveal that, samples of the low modulus corrosion-resistant alloy all include following characteristics: hardness of at least 250 HV, Young's modulus less than 100 GPa, yield strength greater than 600 MPa, and critical pitting potential greater than 1.3V. As a result, experimental data have proved that this low modulus corrosion-resistant alloy has a significant potential for application in the manufacture of biomedical articles including medical devices and surgical implants. In addition, this low modulus corrosion-resistant alloy is also suitable for application in the manufacture of various industrially-producible articles, including springs, coils, wires, clamps, fasteners, blades, valves, elastic sheets, spectacle frames, sports equipment, and other high-strength low-modulus corrosion-resistant structural materials.

Abstract: In the present invention, a multi-film structure being coated on the surface of a workpiece is disclosed. The multi-film structure is formed by making a high-entropy material film of at least two layers and a non-high-entropy material film of at least one layer be stacked on each other. In addition, the multi-film structure can also be formed by making a first high-entropy material film of at least one layer and a second non-high-entropy material film of at least one layer be stacked on each other. This multi-film structure particularly contains interlaminar interfaces to inhibit crack extension and reduce plastic deformation, so that the hardness and toughness of the workpiece coated with this inventive multi-film structure would be obviously enhanced. Moreover, the appearance color of the workpiece can also be changed by the multi-film structure, wherein the color type is dependent on the optical interferences occurring in the multi-film structure.

Abstract: In the present invention, a multi-film structure being coated on the surface of a workpiece is disclosed. The multi-film structure is formed by making a high-entropy material film of at least two layers and a non-high-entropy material film of at least one layer be stacked on each other. In addition, the multi-film structure can also be formed by making a first high-entropy material film of at least one layer and a second non-high-entropy material film of at least one layer be stacked on each other. This multi-film structure particularly contains interlaminar interfaces to inhibit crack extension and reduce plastic deformation, so that the hardness and toughness of the workpiece coated with this inventive multi-film structure would be obviously enhanced. Moreover, the appearance color of the workpiece can also be changed by the multi-film structure, wherein the color type is dependent on the optical interferences occurring in the multi-film structure.

Abstract: A metal fuel powered driving system comprises: a cylinder; a piston disposed movably in and cooperating with the cylinder to define a combustion chamber; an arc generating unit including first and second electrodes extending into the combustion chamber, the first electrode being in the form of a first active metal wire; and a first wire supplying unit configured to feed the first active metal wire into the combustion chamber. When the power supplying source applies a voltage to the first and second electrodes, electric arc is generated between the first active metal wire and the second electrode to vaporize and combust the metal wire for driving movements of the piston. A method of driving a piston in a cylinder is also disclosed.

Abstract: An ultra-hard composite material and a method for manufacturing the same, including mixing a metal carbide powder and a multi-element high-entropy alloy powder to form a mixture, green compacting the mixture, and sintering the mixture to form the ultra-hard composite material. The described multi-element high-entropy alloy consists of five to eleven principal elements, with every principal element occupying a 5 to 35 molar percentage of the alloy.

Abstract: A magnetic multi-element alloy film adapted to be used in a high-frequency operation is provided. The magnetic multi-element alloy film is employed to improve a Q factor and an inductance value of a thin film inductor operated in high frequency. The design concept of a multi-element high-entropy alloy is introduced into the magnetic multi-element alloy film. With material characteristics including high randomness, nanometer microcrystalline structure, low coercive magnetic field and high resistivity, the magnetic multi-element alloy film can still have favorable soft magnetism when operated in high frequency.

Abstract: The disclosed is an ultra-hard composite material. The method for manufacturing the ultra-hard composite material includes mixing a metal carbide powder and a multi-element high-entropy alloy powder to form a mixture, green compacting the mixture, and sintering the mixture to form the ultra-hard composite material. The described multi-element high-entropy alloy consists of five to eleven principal elements, with every principal element occupying a 5 to 35 molar percentage of the alloy.

Abstract: A magnetic multi-element alloy film adapted to be used in a high-frequency operation is provided. The magnetic multi-element alloy film is employed to improve a Q factor and an inductance value of a thin film inductor operated in high frequency. The design concept of a multi-element high-entropy alloy is introduced into the magnetic multi-element alloy film. With material characteristics including high randomness, nanometer microcrystalline structure, low coercive magnetic field and high resistivity, the magnetic multi-element alloy film can still have favorable soft magnetism when operated in high frequency.

Abstract: High-temperature resistant alloys, with low Co and Ni contents and a predominant face-centered cubic (FCC) matrix, are formed by selecting an appropriate combination of elements based on a ‘multi-principle-element alloy design’. It exhibits excellent properties in terms of workability, toughness, high-temperature strength, corrosion resistance and oxidation resistance. These alloys are designed to incorporate five to seven principal elements, which include Co, Cr, Fe, and Ni, plus one, or a combination of Al, Mo, and Ti. The Co and Ni elements have contents of 20 to 35 atomic percent, and those of Cr and Fe are between 12.5 and 20 atomic percent. The sum of the Co, Ni, Cr, and Fe is not less than 65 atomic percent, and the sum of Al, Mo, and Ti contents is between 5 and 25 atomic percent. The properties of the alloys can be further modified by the addition of minor elements, such as Ag, B, C, Cu, Mn, Nb, Ta, Si, V, W, Y, and Zr, whose sum does not exceed 10 atomic percent.

Abstract: A multi metal base hardfacing alloy is provided. The atom percent of each element in the alloy is smaller than 35%. When the alloy is used as a welding material, it has advantages such as low operating temperature, better physical strength hardiness, acid resistance, basic resistance, anti-oxidation, and interface obturation.

Abstract: A high strength multi-component alloy contains multi-principal elements and is formulated under a design concept different from the prior art. The multi-component alloy contains Fe, Co, Ni, Cr, Cu and Al as main elements. Each main element of the multi-component alloy is in the range of about 5 to about 35 atom % based on the total number of atoms of the alloy. The multi-component alloy has high strength at high temperature.