Search

JP-7856888-B2 - Electrolytic Ni-Cr alloy foil, method for manufacturing the same, and composite member

JP7856888B2JP 7856888 B2JP7856888 B2JP 7856888B2JP-7856888-B2

Inventors

  • 河野 明訓
  • 三宅 正男
  • 平藤 哲司

Assignees

  • 日本製鉄株式会社

Dates

Publication Date
20260512
Application Date
20220303

Claims (10)

  1. An electrolytic Ni-Cr alloy foil having a composition consisting of 5 to 95% by mass of Ni, 5 to 95% by mass of Cr, and impurities, and having a brightness L * of 30 or higher.
  2. The electrolytic Ni-Cr alloy foil according to claim 1, comprising, as the aforementioned impurity, more than 0% by mass and less than or equal to 0.10% by mass of Cl.
  3. The electrolytic Ni-Cr alloy foil according to claim 1 or 2, wherein the impurities include one or more selected from 0.10% by mass or less of O, 0.10% by mass or less of S, 0.10% by mass or less of C, and 0.10% by mass or less of P.
  4. An electrolytic Ni-Cr alloy foil according to any one of claims 1 to 3, having a thickness of 100 μm or less.
  5. An electrolytic Ni-Cr alloy foil according to any one of claims 1 to 4, having a metallic structure containing a δ phase.
  6. An electrolytic Ni-Cr alloy foil according to any one of claims 1 to 5, wherein the average crystal grain size is 5 μm or less.
  7. An electrolytic Ni-Cr alloy foil according to any one of claims 1 to 6, having a Vickers hardness of 300 HV or higher.
  8. A composite member comprising a base material and an electrolytic Ni-Cr alloy foil formed on the base material according to any one of claims 1 to 7.
  9. A method for producing an electrolytic Ni-Cr alloy foil according to any one of claims 1 to 7, A method for performing electrolytic treatment using a plating bath containing Ni ions, Cr ions, and Choline ions, with the remainder being water, chloride ions, and impurities, wherein the molar ratio of Ni ions to Cr ions is 0.001 to 0.150 and the molar ratio of Choline ions to Cr ions is 1.00 to 3.00, and with a current density of 10 mA/ cm² or more and less than 1000 mA/ cm² .
  10. The method according to claim 9, wherein the Ni ions are greater than 0 mol% and less than or equal to 2.00 mol%, the Cr ions are 2.00 to 20.00 mol%, and the choline ions are 3.00 to 40.00 mol%.

Description

This invention relates to electrolytic Ni-Cr alloy foil, a method for manufacturing the same, and composite materials. Alloy foils are used in a variety of applications, including electronic components. Alloy foils are classified into rolled alloy foils and electrolytic alloy foils based on their manufacturing methods. Rolled alloy foil is an alloy foil manufactured by the rolling method. Specifically, it is produced by melting and casting alloy raw materials, followed by rolling and pickling annealing. However, the rolling method has the problem of being costly to manufacture because it requires multiple rolling processes to control the desired thickness. Electrolytic alloy foil is an alloy foil manufactured by an electrolytic method. Specifically, electrolytic alloy foil can be deposited on a cathode by performing electroplating in a plating solution containing multiple metal ions. In particular, by using a cylindrical metal drum cathode as the cathode, electroplating is performed to a predetermined thickness while rotating the metal drum cathode, and then it is wound up to continuously manufacture electrolytic alloy foil. Unlike the rolling method, the electrolytic method has the advantage that production efficiency increases as the thickness of the alloy foil decreases. In recent years, with the demand for miniaturization and weight reduction of electronic components, there has been a need to reduce the thickness of alloy foils used in such components. When manufacturing thin alloy foils, it is desirable to use the electrolytic method as described above from the standpoint of production efficiency. However, Ni-Cr alloy foils containing nickel and chromium are difficult to manufacture using electrolytic methods because the deposition potentials of chromium and nickel are significantly different, and chromium is easily oxidized. On the other hand, electroplating using a deep eutectic solvent containing choline chloride and ethylene glycol has been proposed as a method for producing Fe-Ni-Cr alloys (Non-Patent Document 1). Furthermore, a method of evaporation in argon has been proposed as a method for producing Cr-Ni alloy particles (Non-Patent Document 2). G. Saravanan et al., “Electrodeposition of Fe-Ni-Cr alloy from Deep Eutectic System containing Choline chloride and Ethylene Glycol”, Int. J. Electrochem, Sci., Vol. 6, pp. 1468-1478, 2011N. Yukawa et al., “Structure of Chromium-Rich Cr-Ni, Cr-Fe, Cr-Co and Cr-Ni-Fe Alloy Particles Made by Evaporation in Argon,” Metallurgical Transactions, Vol. 3, pp. 887-895, 1972 The embodiments of the present invention will be described in detail below. The present invention is not limited to the following embodiments, and it should be understood that modifications, improvements, etc., to the following embodiments, based on the ordinary knowledge of those skilled in the art, without departing from the spirit of the invention, also fall within the scope of the present invention. An electrolytic Ni-Cr alloy foil according to an embodiment of the present invention has a composition consisting of Ni, Cr, and impurities. Herein, in this specification, "electrolytic Ni-Cr alloy foil" means Ni-Cr alloy foil manufactured by an electrolytic method. Furthermore, "Ni-Cr alloy foil" means alloy foil having Ni and Cr as alloying components. The Ni content in electrolytic Ni-Cr alloy foil is not particularly limited, but is preferably more than 0% by mass and less than 100% by mass, more preferably 1 to 99% by mass, even more preferably 3 to 97% by mass, and particularly preferably 5 to 95% by mass. By controlling the Ni content within this range, it becomes easier to ensure the properties of the Ni-Cr alloy (for example, heat resistance and corrosion resistance). Here, the chemical composition of the electrolytic Ni-Cr alloy foil, such as its Ni content, can be measured by wet analysis. The Cr content in electrolytic Ni-Cr alloy foil is not particularly limited, but is preferably more than 0% by mass and less than 100% by mass, more preferably 1 to 99% by mass, even more preferably 3 to 95% by mass, and particularly preferably 5 to 91% by mass. Controlling the Cr content within this range makes it easier to ensure the properties of the Ni-Cr alloy (e.g., heat resistance and corrosion resistance). The impurities contained in the electrolytic Ni-Cr alloy foil are components that are introduced during the manufacturing of the electrolytic Ni-Cr alloy foil due to various factors in the plating bath raw materials and manufacturing process, and are acceptable as long as they do not adversely affect the present invention. Impurities are not particularly limited, but may include Cl. Cl mainly originates from the raw materials of the plating bath. Therefore, when chlorides are used as raw materials for the plating bath, Cl is often present in electrolytic Ni-Cr alloy foil. The Cl content in electrolytic Ni-Cr alloy foil is generally greater than 0% by mass, for example, 0.001% by mass or