THE ROLE OF CERIUM AND PRASEODYMIUM AS RARE-EARTH ELEMENTS IN FILLER METAL FOR BRAZING DIAMOND – AN OVERVIEW

XIV International Conference on Industrial Engineering and Environmental Protection – IIZS 2024, str. 63-70

 

АУТОР / AUTHOR(S): Zoran Karastojković, Jasmina Pekez , Radiša Perić

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DOI: 10.46793/IIZS24.063K

САЖЕТАК / ABSTRACT:

In brazing technology is not common practice the use of pure metals as a filler material, but rather in the form of an alloy. A versatility of alloys was developed for use in brazing or soldering, however as in welding. Rare-earth elements (REEs) have specific chemical and metallurgical properties and they are not commonly used in the making of a filler alloy. So, it would be expected that cerium, praseodymium and samarium, as part of group REEs, may be used for improving some specific properties of a filler brazing alloy. Providing brazing technologies includes a versatility of chemical and metallurgical properties and demands that should be fullfilled, such as fluidity, strength, corrosion resistance, etc. Most of these properties may be satisfied when added cerium, praseodymium or other REEs in small amounts in brazing filler metal (BFM). For economical reasons, the using of REEs is not profitable, because they are expensive, rather than for technological reasons, at first for deoxidation during melting and improving the wettability. For brazing diamonds such expensive filler metal could be used only if the bond strength is increasing.

КЉУЧНЕ РЕЧИ / KEYWORDS:

brazing, cerium, praseodymium, doping, filler metals

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