Ceramic–metal interaction and wetting phenomena in the B4C/Cu system

Froumin, N.; Frage, N.; Aizenshtein, M.; Dariel, M.P.

doi:10.1016/s0955-2219(03)00294-2

Cited by 42 publications

(19 citation statements)

References 6 publications

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“…For Cu-9at.%B joined B 4 C, the interface of the ceramic specimens remains flat and no evidence of new phases was detected ( Figure 3). This observation is in a good agreement with the previously reported results on the wetting behavior in the B 4 C/Cu-B system (Froumin et al, 2003).…”

Section: Interface Characterization Of the B 4 C Jointssupporting

confidence: 93%

“…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. Experimental results for Ti and B alloyed Cu and Ti alloyed Ag are presented in Figure 1.…”

Section: Introductionmentioning

confidence: 79%

“…The interaction parameter, L 0 , of the Ag-B and Cu-B liquid solutions was estimated using the binary phase diagrams (Okamoto et al, 1992;Froumin et al, 2003). At 1423K, the values of L 0 of the Cu-B and Ag-B systems are 20 kJ/mol and 90 kJ/mol respectively.…”

Section: Interface Characterization Of the B 4 C Jointsmentioning

confidence: 99%

“…Experimental results for Ti and B alloyed Cu and Ti alloyed Ag are presented in Figure 1. In the B 4 C/(Cu,Ag)-Ti systems, the improved wetting is achieved due to the formation of new phases at the interface, while in the B 4 C/Cu-B system, the contact angle decreases as a result of the composition shift of boron carbide towards higher boron contents (Froumin et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Section: Interface Characterization Of the B 4 C Jointssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 79%

Section: Interface Characterization Of the B 4 C Jointsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…It has been established that boron addition (above 2.8 at%) to liquid Cu prevents the formation of a crater and leads to improved wetting ( Figure 3) [24]. Figure 4 shows that experimental results are in good agreement with the thermodynamic calculations shown above.…”

Section: Spreading and Interface Characterizationsupporting

confidence: 70%

Experimental Study and Thermodynamic Analysis of High Temperature Interactions between Boron Carbide and Liquid Metals

Aizenshtein¹,

Froumin²,

Frage³

2014

ENG

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How to cite this paper: Aizenshtein, M., Froumin, N. and Frage, N. (2014) AbstractFabrication of MCCs (Metal Ceramic Composites) and ceramic brazing requires improved wetting properties are often absent in various ceramic/metals systems. This report summarizes a comprehensive study concerning the wetting properties of boron carbide in contact with non-reactive metals such as Cu, Au, Ag, and Sn. In order to improve wetting, three different reactive elements were added to the melts; Si, which has relatively high affinity to C, leads to SiC formation and changes the stoichiometric boron carbide composition (B4C) towards lower carbon content; Ti, which displays high affinity to B, leads to TiB2 formation and free carbon precipitation at the interface; and finally, Al, which forms borocarbide phases at the interface. It was found that Cu is unusual with respect to boron carbide compared the other non-reactive metals. The most important difference is its ability to dissolve ~25 at% of B, which makes B adequate as an additive to Cu in addition to Si, Ti, and Al. When boron was used as an alloying element, its effect on wetting behavior was attributed to altering the boron carbide composition in contact with boron-containing melts. It was concluded that the most important properties of boron carbide that affect wetting phenomena are the relatively low chemical stability and the existence of a wide composition range (B4C-B10C). The first property determines the possibility of boron carbide to react with liquid metals (by dissolution or formation of new phases) and the second offers an additional degree of freedom to improve its wetting by changing the composition of the ceramic phase.

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Interface Phenomena and Wettability in the B₄C/(Me-Si) Systems (Me =Cu, Au, Sn)

Froumin

Aizenshtein

Frage

et al. 2012

Ceramic Transactions Series

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Ceramic–metal interaction and wetting phenomena in the B4C/Cu system

Cited by 42 publications

References 6 publications

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

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

Experimental Study and Thermodynamic Analysis of High Temperature Interactions between Boron Carbide and Liquid Metals

Interface Phenomena and Wettability in the B₄C/(Me-Si) Systems (Me =Cu, Au, Sn)

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Ceramic–metal interaction and wetting phenomena in the B4C/Cu system

Cited by 42 publications

References 6 publications

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

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

Experimental Study and Thermodynamic Analysis of High Temperature Interactions between Boron Carbide and Liquid Metals

Interface Phenomena and Wettability in the B4C/(Me-Si) Systems (Me =Cu, Au, Sn)

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Interface Phenomena and Wettability in the B₄C/(Me-Si) Systems (Me =Cu, Au, Sn)