energy storage


Ceramic-metal welding

Ionotec can provide expertise in bonding techniques which are particularly suitable where hermetic or vacuum-tight joints are required:

  • ceramic-metal welding
  • glass-ceramic bonding
  • glass-metal joining 
  • ultrasonic welding
  • thermocompression bonding (TCB)

 Examples of ceramic-metal welding include

  • aluminium oxide to aluminium
  • aluminium oxide to stainless steel
  • aluminium oxide to aluminium-magnesium alloy
  • silicon nitride to aluminium

glass sealing


ceramic-metal welding


Ultrasonic welding

Ultrasonic welding is a fast process that can be used for bonding dissimilar metals and for ceramic-metal welding. Some advantages of the ultrasonic method are:

  • High speed - bonding times of less than 1 second
  • Economical, with low power consumption
  • The joint is formed from a low temperature solid state weld
  • No flux, braze or solder needed
  • No pre-cleaning, high temperatures or special environment needed

Not all materials are suited to ultrasonic welding, especially if they have low mechanical strength.  In such cases thermocompression bonding may be suitable.

Welding of dissimilar metals and alloys


Ultrasonic welding is suitable not only for ceramic-metal welding but also for a variety of metal-metal joints, particularly for dissimilar metals which can be difficult to weld by other techniques.  


Examples of ultrasonically weldable metal-metal couples


aluminium - aluminium aluminium - Fecralloy
aluminium - AlMg3 alloy aluminium - molybdenum
aluminium - copper nickel 200 - nickel 200
aluminium - nickel 200 brass 90/10 - brass 80/20
aluminium - brass 90/10 copper - brass 90/10
aluminium - stainless steel stainless steel - Fecralloy
aluminium - Inconel 600 aluminium - Nimonic
aluminium - titanium titanium - Nimonic 

Thermocompression bonding

Thermocompression bonding (TCB) is also particularly suited to ceramic-metal welding. It is a slower process than ultrasonic welding but may be particularly suitable for joints in which an aluminium interlayer is unacceptable or where the ceramic material is too weak to withstand the high load and shear stress encountered in ultrasonic welding.