Brazing
Hydrogen brazing

IJ Research processes in either wet or dry H2 atmosphere depending on the conditions and requirement of the parts. Dry H2 atmosphere is highly reactive and this process offers the excellent thermo-metallurgical wetting of the braze to parts.

Vacuum brazing

IJ Research processes in vacuum as well. As requires we process it with an alteration of a reducing atmosphere and vacuum. Other cover gases we use are N2, Ar, He or some of these mixtures. In order to meet specific combinations of the gasses and vacuum, many of the processing furnaces at IJ Research are custom designed.

Induction brazing

While furnace brazing requires heating the entire parts, induction brazing allows a localized heat. The induction brazing system contains a cover gas control system so that air intake is minimal.

Diffusion bonding

This is a sealing process of a ceramic on one side and a metal on the other side with nothing in-between and is a direct inter-diffusion bonding process. IJ Research performs various glass/glass, glass/ceramic and metal/metal besides the popular ceramic/metal or ceramic and ceramic bonding. Our process includes a liquid phase and others. Bonding, joining or sealing can be achieved by ‘thermo-metallurgical’ or this ‘thermo-diffusive’ bonding and IJ Research offer both*.

*These terminologies are the ones what IJ Research prefers to adapt and use. The thermo-metallurgical bonding has a metallurgical reaction such as soldering or brazing. The thermo-diffusive bonding is by an (inter)diffusion processing at high temperature.

Active Metal Element Brazing

For certain geometry and layout of a ceramic and metal seal assembly, IJ Research uses a braze that contains a small amount of highly reactive element that has a function to bond the ceramic. In this process, the ceramic may not need to be metallized prior to the brazing. This IJ Research thermo-diffusively and thermo-metallurgically reactive braze has very different form and shape when it is compared with the commercially available counterparts. IJ Research product is not only material friendly, but also process advantageous. In a contact angle analysis, it possesses very advantageous position leading superior bonding strength result.

This process performs the best when the thermal properties of the components are compatible. However, the end result can be even better by other IJ Research techniques, but again it offers no metallization on the ceramic. In some cases, any other options may not be usable.