Brazing characteristics of vertical joints with silver copper eutectic alloy Ag72Cu28 for RFQ section brazing stage

IF 0.9 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY
Kyung Hyun Kim, Jung Goo Hong
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引用次数: 0

Abstract

A radio-frequency quadrupole (RFQ) is a critical component in particle accelerator technology, and section brazing is a crucial fabrication process in this context. This study investigates the brazing characteristics of vertical joints created using Ag72Cu28 metal filler in a high-vacuum environment. Experimental specimens were prepared with copper plates and brazed at temperatures ranging from 778 to 805° C to analyze the melting behavior of the filler. X-ray computerized tomography (CT) scans revealed that the filler begins to melt at 782° C and that complete melting occurs at 784° C. It was found that maintaining temperatures of above 780° C for at least 17 min ensures optimal bonding, while temperatures below this can result in incomplete melting and potential vacuum leaks. Conversely, excessively high temperatures can cause filler overflow and require additional machining. This study provides critical insights regarding the precise temperature control required for successful RFQ section brazing, addressing the challenges of vacuum leaks and incomplete filler melting. These findings offer practical guidelines related to the minimum brazing temperature and brazing time for improving RFQ manufacturing reliability, particularly for vertical joint configurations.

银铜共晶合金Ag72Cu28垂直接头RFQ截面钎焊阶段的钎焊特性
射频四极杆(RFQ)是粒子加速器技术中的关键部件,截面钎焊是其中的关键制造工艺。研究了在高真空环境下用Ag72Cu28金属钎料钎焊垂直接头的钎焊特性。在778 ~ 805℃的温度范围内,用铜板制备实验试样,分析钎料的熔化行为。x射线计算机断层扫描(CT)显示,填料在782°C开始熔化,在784°C完全熔化。研究发现,保持780°C以上的温度至少17分钟可以确保最佳粘合,而低于此温度可能导致不完全熔化和潜在的真空泄漏。相反,过高的温度会导致填料溢出,需要额外的加工。这项研究为成功的RFQ焊段所需的精确温度控制提供了关键的见解,解决了真空泄漏和填料熔化不完全的挑战。这些发现提供了有关最低钎焊温度和钎焊时间的实用指南,以提高RFQ制造的可靠性,特别是垂直连接配置。
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来源期刊
Journal of the Korean Physical Society
Journal of the Korean Physical Society PHYSICS, MULTIDISCIPLINARY-
CiteScore
1.20
自引率
16.70%
发文量
276
审稿时长
5.5 months
期刊介绍: The Journal of the Korean Physical Society (JKPS) covers all fields of physics spanning from statistical physics and condensed matter physics to particle physics. The manuscript to be published in JKPS is required to hold the originality, significance, and recent completeness. The journal is composed of Full paper, Letters, and Brief sections. In addition, featured articles with outstanding results are selected by the Editorial board and introduced in the online version. For emphasis on aspect of international journal, several world-distinguished researchers join the Editorial board. High quality of papers may be express-published when it is recommended or requested.
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