Date:

2025-04-30

Title of Paper:

Effect of Ni addition on the dielectric strength and liquid phase separation of Cu-Cr alloys during the vacuum breakdown

Journal:

VACUUM

Summary:

The Cr-Ni and Cu-Cr-Ni alloys were prepared and their dielectric strengths were tested in a vacuum chamber. The experimental results showed that the Cr95Ni5 (at.%) alloy prepared by vacuum arc melting could strengthen the dielectric strength of Cr by 130%, and the addition of the Cr-Ni alloy powders could more obviously improve the dielectric strength of the Cu55Cr45 alloy than that of Ni. The dielectric strength of Cu (Cr95Ni5)(Cu = 55, Cr95Ni5 = 45, at.%) was higher than that of commercial Cu55Cr45 alloys and improved by 61%. The results revealed that the liquid phase separation took place in the Cu-Cr-Ni alloys during the vacuum breakdown. The Ni addition could restrain the liquid phase separation of the Cu-Cr alloys and refine the Cr particles.

Co-author:

Wei, Xin; Yu, Demei; Sun, Zhanbo; Yang, Zhimao; Song, Xiaoping; Ding, Bingjun

Translation or Not:

No

Date of Publication:

2014-11-01