Liquid metal wettability and advanced ceramic brazing

Naidich, Yu. V.; Журавлев, В. Г.; Gab, I. I.; Kostyuk, B. D.; Krasovskyy, V. P.; Adamovskyy, A.A.; Taranets, N. Yu.

doi:10.1016/j.jeurceramsoc.2007.07.021

Cited by 79 publications

(22 citation statements)

References 13 publications

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“…The reaction between the contact surfaces and brazing filler is key to improve the wetting. In the active metal brazing, a higher wetting can be achieved using Ti, Sc, Cr, or Zr active metals that minimize the surface energy and enhance wetting [21].…”

Section: Issues In Metal-ceramic Wettingmentioning

confidence: 99%

“…Most of the brazing fillers so far available for ceramic-metal joining are silver-based alloys mostly produced by casting approach, e.g., Ag-Cu, Ag-Cu-Ti, Ag-Cu-Sn-Ti, Ag-Cu-In-Ti, etc. [19][20][21][22][23][24][25][26]. Several elements are added to enhance the wetting of the contact surfaces which further produce unwanted IMCs.…”

Section: Fillers Processed By Powder Technologymentioning

confidence: 99%

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High-Entropy Alloys for Micro- and Nanojoining Applications

Sharma¹

2020

Engineering Steels and High Entropy-Alloys

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The aim of this chapter is to provide a basic understanding of the metal-ceramic joints and high-entropy alloy (HEA) research in microjoining applications. We will first overview the issues in metal-ceramic brazing and solutions to overcome those issues using various fillers. Various approaches are available for joining ceramic to metallic materials. One approach will be to look for brazing alloys with the so-called high-entropy characteristics which exhibit a solid solution phase. The conventional alloy design and arc melting, Bridgman solidification, and advanced powder metallurgy techniques will be studied, including high-energy ball milling (HEBM) for the mechanical alloying process, and hot-press and spark plasma sintering (SPS) techniques are utilized for improved densification and phase transformation. We also summarize the various thermodynamic relations to obtain the high-entropy phase and present future possibilities of high-entropy alloys in microjoining research at the later stage of this chapter.

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Section: Issues In Metal-ceramic Wettingmentioning

confidence: 99%

Section: Fillers Processed By Powder Technologymentioning

confidence: 99%

High-Entropy Alloys for Micro- and Nanojoining Applications

Sharma¹

2020

Engineering Steels and High Entropy-Alloys

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“…The scientific principles involved in the brazing of monolithic ceramics to metals have been discussed by Akselsen where the mechanical properties of directly brazed ceramicmetal joints are discussed as a function of key parameters such as temperature and time [Akselsen, 1992]. For a ceramic-metal brazed joint to be successful, a crucial point is wettability of the ceramic by the liquid metals since in the majority of ceramic-metal systems direct wetting is not observed [Naidich et al, 2008]. The limitation of poor wettability can be overcome by the incorporation of an "active metal" into the braze or to precoat the ceramic with a wetting promoter or the metallization of the ceramic prior to the brazing process [Dixon, 1995;Moutis et al, 2010].…”

Section: Brazingmentioning

confidence: 99%

Joining of Cf/C and Cf/SiC Composites to Metals

Mergia¹

2011

Nanocomposites With Unique Properties and Applications in Medicine and Industry

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“…Adequate wetting of boron carbide may be achieved by using active brazing alloys. Yet, the major drawback of B 4 C is related to its' low coefficient of thermal expansion (4-8·10 -6 K -1 ) compared to brazing metals (16.6·10 -6 K -1 and 19.1·10 -6 K -1 for Cu and Ag, respectively) which might cause residual stresses at the interface (Naidich et al, 2008). The results of a systematical investigation of boron carbide wettability by various metals were reported in previous publications (Froumin et al, 2003;Frage et al, 2004;Aizenshtein et al, 2005a;Aizenshtein et al, 2005b;Aizenshtein et al, 2008a;Aizenshtein et al, 2008b) and the wetting mechanism is well understood.…”

Section: Introductionmentioning

confidence: 99%

Brazing of Boron Carbide by Cu-Alloys: Interface Interaction and Mechanical Properties of Joints

Aizenshtein¹,

Silhov²,

Froumin³

et al. 2012

JMSR

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Boron carbide is one of the most promising structural ceramics; therefore its joining to other ceramics and metals is of technological importance. In this study, interface interactions and joints strength were studied in various cases of B 4 C/Cu based fillers (Cu-9at%B, Cu-4.5at%Ti and Ticusil®). The fillers partially wet B 4 C (< 50 0 ), but the interface composition and morphology are different. In the B 4 C/Cu-9at.%B system no new phases are detected at the interface, while the formation of TiB 2 takes place in the case B 4 C/Cu-4.5at%Ti, and a double layer containing TiB 2 and TiC is formed at the B 4 C/Ticusil® interface.The maximal shear stress for B 4 C/B 4 C joints breakage was obtained for the Cu-9at.%B brazing alloy which displays partial wetting without the formation of brittle phases at the ceramic/metal interface.This study shows that improved wetting is essential but not sufficient in order to obtain strong bonding between B 4 C and the fillers examined.

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Liquid metal wettability and advanced ceramic brazing

Cited by 79 publications

References 13 publications

High-Entropy Alloys for Micro- and Nanojoining Applications

High-Entropy Alloys for Micro- and Nanojoining Applications

Joining of Cf/C and Cf/SiC Composites to Metals

Brazing of Boron Carbide by Cu-Alloys: Interface Interaction and Mechanical Properties of Joints

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