阅读说明：本技术 一种用于超导腔的铜铌复合材料板的制作方法 (Manufacturing method of copper-niobium composite material plate for superconducting cavity ) 是由 刘振超 张琦 王盛 于 2021-06-25 设计创作，主要内容包括：本发明公开了一种用于超导腔的铜铌复合材料板的制作方法,包括以下步骤：在金属铌板上铺设无氧纯铜粉末,通过激光束照射无氧纯铜粉末,利用激光的能量将无氧纯铜粉末加热至完全融化,并与金属铌板表层熔化,以形成铜铌复合物,然后通过重复铺粉及熔化成型,以形成铜铌复合材料板,该方法能够制备得到的铜铌复合材料板能够用于超导腔。(The invention discloses a method for manufacturing a copper-niobium composite material plate for a superconducting cavity, which comprises the following steps of: laying oxygen-free pure copper powder on a metal niobium plate, irradiating the oxygen-free pure copper powder by laser beams, heating the oxygen-free pure copper powder by using the energy of the laser until the oxygen-free pure copper powder is completely melted and is melted with the surface layer of the metal niobium plate to form a copper-niobium composite, and then repeatedly laying powder and melting and forming to form the copper-niobium composite plate.)

1. A manufacturing method of a copper-niobium composite material plate for a superconducting cavity is characterized by comprising the following steps:

laying oxygen-free pure copper powder on a metal niobium plate, irradiating the oxygen-free pure copper powder by laser beams, heating the oxygen-free pure copper powder by using the energy of the laser until the oxygen-free pure copper powder is completely melted and is melted with the surface layer of the metal niobium plate to form a copper-niobium composite, and then repeatedly laying powder and melting and forming to form the copper-niobium composite plate.

2. The method for manufacturing the copper-niobium composite plate for the superconducting cavity according to claim 1, comprising the following steps:

1) taking a niobium plate, fixing the metal niobium plate on a substrate, and placing the substrate in a printing cavity;

2) filling oxygen-free pure copper powder into a printer, vacuumizing a printing cavity, and filling protective gas;

3) heating and melting the oxygen-free pure copper powder on the metal niobium plate by using laser emitted by a printer to obtain a copper-niobium composite plate;

4) and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness to obtain the copper-niobium composite board for the superconducting cavity.

3. The method of claim 1, wherein the laser power during the printing is 320W to 400W.

4. The method for manufacturing the copper-niobium composite material plate for the superconducting cavity according to claim 1, wherein a scanning speed in a printing process is 400-800 mm/s.

5. The method for manufacturing the copper-niobium composite material plate for the superconducting cavity according to claim 1, wherein a scanning pitch is 0.05-0.08 mm during printing.

6. The method for manufacturing the copper-niobium composite material plate for the superconducting cavity according to claim 1, wherein the powder coating layer of the oxygen-free pure copper powder is 0.03-0.08 mm thick.

7. The method of manufacturing a copper-niobium composite sheet for a superconducting cavity according to claim 1, wherein the obtained copper-niobium composite sheet is processed to a designed thickness by a grinding machine.

8. The method for manufacturing the copper-niobium composite plate for the superconducting cavity according to claim 1, wherein the specific process of the step 4) is as follows: and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness to obtain the copper-niobium composite board for the superconducting cavity.

Technical Field

The invention relates to a method for manufacturing a copper-niobium composite material plate, in particular to a method for manufacturing a copper-niobium composite material plate for a superconducting cavity.

Background

Radio frequency superconducting acceleration is one of the key technologies of modern particle accelerators, capable of accelerating charged particle beams in continuous wave and long pulse modes. The radio frequency superconducting accelerating cavity has the advantages of low heat loss, high electric conversion efficiency and the like, and is widely applied to various high-energy accelerators and light source devices.

High purity niobium is a class ii superconductor with a higher critical temperature (Tc ═ 9.2K), which since 1967 was used as a superconducting cavity material instead of copper due to its high critical temperature and high critical magnetic field. The quality factor (Q value) of the high-purity niobium superconducting cavity is 10 higher than that of the copper cavity⁵～10⁶Multiple, low power loss, high gradient of accelerating field, low impedance, and high efficiencyTo achieve excellent energy resolution and stability.

Because of the excellent performances of high melting point, acid and alkali resistance, low neutron absorption cross section and the like, the high-purity niobium is the preferred material for manufacturing the radio frequency superconducting accelerating cavity so far. However, pure niobium has poor thermal conductivity and high price, and scientists begin to research novel superconducting copper-niobium composite materials. In 1980, the european nuclear Center (CERN) started to try to prepare a copper-niobium sputtering coating superconducting cavity by sputtering a layer of niobium film on the surface of a copper substrate by a magnetron sputtering method, and a great deal of research was carried out, but the copper-niobium sputtering coating superconducting cavity can not be replaced by a pure niobium superconducting cavity due to the limitations of coating quality stability, uniformity, superconducting performance, efficiency cost and the like.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a method for manufacturing a copper-niobium composite material plate for a superconducting cavity, and the copper-niobium composite material plate manufactured by the method can be used for the superconducting cavity.

In order to achieve the above purpose, the method for manufacturing the copper-niobium composite material plate for the superconducting cavity comprises the following steps:

laying oxygen-free pure copper powder on a metal niobium plate, irradiating the oxygen-free pure copper powder by laser beams, heating the oxygen-free pure copper powder by using the energy of the laser until the oxygen-free pure copper powder is completely melted and is melted with the surface layer of the metal niobium plate to form a copper-niobium composite, and then repeatedly laying powder and melting and forming to form the copper-niobium composite plate.

The method specifically comprises the following steps:

1) taking a niobium plate, fixing the metal niobium plate on a substrate, and placing the substrate in a printing cavity;

2) filling oxygen-free pure copper powder into a printer, vacuumizing a printing cavity, and filling protective gas;

3) heating and melting the oxygen-free pure copper powder on the metal niobium plate by using laser emitted by a printer to obtain a copper-niobium composite plate;

4) and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness to obtain the copper-niobium composite board for the superconducting cavity.

And in the printing process, the laser power is 320W-400W.

In the printing process, the scanning speed is 400-800 mm/s.

In the printing process, the scanning distance is 0.05-0.08 mm.

The powder spreading layer thickness of the oxygen-free pure copper powder is 0.03-0.08 mm.

And processing the obtained copper-niobium composite board to a designed thickness by using a grinding machine.

The specific process of the step 4) is as follows: and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness to obtain the copper-niobium composite board for the superconducting cavity.

The invention has the following beneficial effects:

according to the manufacturing method of the copper-niobium composite plate for the superconducting cavity, during specific operation, the oxygen-free pure copper powder is irradiated by laser beams, the oxygen-free pure copper powder is heated to be completely melted by using the energy of the laser beams and is melted with the surface layer of the metal niobium plate to form the copper-niobium composite, and then the copper-niobium composite plate is formed by continuously repeating powder laying and melting forming.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The manufacturing method of the copper-niobium composite material plate for the superconducting cavity comprises the following steps:

1) taking a niobium plate, fixing the metal niobium plate on a substrate, and placing the substrate in a printing cavity;

2) filling oxygen-free pure copper powder into a printer, vacuumizing a printing cavity, and filling protective gas;

3) heating and melting the oxygen-free pure copper powder on the metal niobium plate by using laser emitted by a printer to obtain a copper-niobium composite plate;

in the printing process, the laser power is 320W-400W, the scanning speed is 400-800 mm/s, the scanning interval is 0.05-0.08 mm, and the powder spreading layer is 0.03-0.08 mm thick;

4) and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness by using a grinding machine to obtain the copper-niobium composite board for the superconducting cavity.

The working principle of the invention is as follows:

laying a layer of oxygen-free pure copper powder on a metal niobium plate, irradiating the oxygen-free pure copper powder by using laser beams, heating the oxygen-free pure copper powder by using the energy of the laser until the oxygen-free pure copper powder is completely melted, melting the oxygen-free pure copper powder and the surface layer of the metal niobium plate to form a copper-niobium composite plate, and then continuously and repeatedly spreading powder and melting and forming to form the copper-niobium composite plate.

Example one

The manufacturing method of the copper-niobium composite material plate for the superconducting cavity comprises the following steps:

1) taking a niobium plate, fixing the metal niobium plate on a substrate, and placing the substrate in a printing cavity;

2) filling oxygen-free pure copper powder into a printer, vacuumizing a printing cavity, and filling protective gas;

3) heating and melting the oxygen-free pure copper powder on the metal niobium plate by using laser emitted by a printer to obtain a copper-niobium composite plate;

wherein, in the printing process, the laser power is 320W, the scanning speed is 400mm/s, the scanning interval is 0.05mm, and the powder layer spreading thickness is 0.03 mm;

4) and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness by using a grinding machine to obtain the copper-niobium composite board for the superconducting cavity.

Example two

The manufacturing method of the copper-niobium composite material plate for the superconducting cavity comprises the following steps:

1) taking a niobium plate, fixing the metal niobium plate on a substrate, and placing the substrate in a printing cavity;

2) filling oxygen-free pure copper powder into a printer, vacuumizing a printing cavity, and filling protective gas;

3) heating and melting the oxygen-free pure copper powder on the metal niobium plate by using laser emitted by a printer to obtain a copper-niobium composite plate;

in the printing process, the laser power is 400W, the scanning speed is 800mm/s, the scanning interval is 0.08mm, and the powder layer spreading thickness is 0.08 mm;

4) and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness by using a grinding machine to obtain the copper-niobium composite board for the superconducting cavity.

EXAMPLE III

The manufacturing method of the copper-niobium composite material plate for the superconducting cavity comprises the following steps:

1) taking a niobium plate, fixing the metal niobium plate on a substrate, and placing the substrate in a printing cavity;

2) filling oxygen-free pure copper powder into a printer, vacuumizing a printing cavity, and filling protective gas;

3) heating and melting the oxygen-free pure copper powder on the metal niobium plate by using laser emitted by a printer to obtain a copper-niobium composite plate;

in the printing process, the laser power is 360W, the scanning speed is 600mm/s, the scanning interval is 0.065mm, and the powder layer thickness is 0.055 mm;

4) and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness by using a grinding machine to obtain the copper-niobium composite board for the superconducting cavity.

Example four

The manufacturing method of the copper-niobium composite material plate for the superconducting cavity comprises the following steps:

1) taking a niobium plate, fixing the metal niobium plate on a substrate, and placing the substrate in a printing cavity;

2) filling oxygen-free pure copper powder into a printer, vacuumizing a printing cavity, and filling protective gas;

3) heating and melting the oxygen-free pure copper powder on the metal niobium plate by using laser emitted by a printer to obtain a copper-niobium composite plate;

wherein, in the printing process, the laser power is 350W, the scanning speed is 500mm/s, the scanning interval is 0.06mm, and the powder layer spreading thickness is 0.04 mm;

4) and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness by using a grinding machine to obtain the copper-niobium composite board for the superconducting cavity.

EXAMPLE five

The manufacturing method of the copper-niobium composite material plate for the superconducting cavity comprises the following steps:

1) taking a niobium plate, fixing the metal niobium plate on a substrate, and placing the substrate in a printing cavity;

2) filling oxygen-free pure copper powder into a printer, vacuumizing a printing cavity, and filling protective gas;

3) heating and melting the oxygen-free pure copper powder on the metal niobium plate by using laser emitted by a printer to obtain a copper-niobium composite plate;

in the printing process, the laser power is 380W, the scanning speed is 700mm/s, the scanning interval is 0.07mm, and the powder layer spreading thickness is 0.07 mm;

4) and separating the printed copper-niobium composite board from the substrate, removing impurities on the surface of the copper-niobium composite board, and processing the obtained copper-niobium composite board to a designed thickness by using a grinding machine to obtain the copper-niobium composite board for the superconducting cavity.