Brazing is a 5000-year-old joining process which still meets advanced joining challenges today. In brazing, components are joined by heating above the melting point of a filler metal placed between...

https://tandfonline.com/doi/pdf/10.1080/09506608.2019.1613311

Brazing filler metals

Interfacial bonding mechanism and adhesive transfer of brazed diamond with Ni-based filler alloy: First-principles and experimental perspective

Active brazing is a promising technique for the fabrication of high-performance diamond abrasive tools, which is especially beneficial to the manufacturing of hard-to-machine materials such as ceramics and high-strength metals. Ni-Cr based filler alloys are commonly used to fabricate diamond abrasive tools under different brazing strategies. However, in the previous studies brazing conditions are inconsistent, and the mechanisms of the interface reaction and the microstructure evolution in the synthetic diamond and Ni-Cr-P filler alloy reaction system are not well understood. In this work, the interface reaction and solidified microstructure in AISI 1045 steel and diamond grit joints brazed using a commercial Ni-Cr-P filler alloy were systematically studied at a typical brazing temperature of 950 °C. A rapid formation of both Cr3C2 and Cr7C3 compounds was observed at the very early stage of liquid-solid reaction. An anomalous delamination of Cr7C3 and formation of primary (Ni,Cr)5P2 dendrites and FeNi3 phase in near-eutectic Ni-P matrix were observed after extended brazing reaction. Moreover, the effect of brazing time on the residual thermal stresses, and hence the integrity of brazed synthetic diamond, were experimentally revealed and discussed with the implications for the fabrication of diamond abrasive tools.

Interfacial microstructure and mechanical properties of synthetic diamond brazed by Ni-Cr-P filler alloy

Filler metals, brazing processing and reliability for diamond tools brazing: A review

D. Raghava Simhan

Papers

Challenges in brazing large synthetic diamond grit by Ni-based filler alloy

Vacuum brazing of cubic boron nitride to medium carbon steel with Zr added passive and Ti activated eutectic Ag-Cu alloys

On segregation of Zr and wettability of active Ag-Cu-Zr alloy on cubic boron nitride surface

High vacuum active brazing of cBN with improved composite filler: Microstructure, interfaces and performance evaluation

Active brazing of cBN micro-particles with AISI 1045 steel using ceramic reinforced Ag-based fillers