Vacuum Hot Pressing
Many ceramic powders cannot be sintered to full density, so we employ Vacuum Hot Pressing as a technique for making ceramic (and powder metal) targets that are near-net-shape and high density. SCI’s five vacuum hot presses permit us to produce targets measuring from 1″ to 20″ in diameter.
Nature abhors it, we just think it's really neat.
By using referring to the ideal gas law (PV = nRT), we know that pressure and temperature are directly proportional within a standard volume. By utilizing a vacuum in our hot-pressing we can increase the temperature of materials to a point that would vaporize them at nominal pressure but within a vacuum, slightly melt and densify with pressure. This process of heating and/or pressing a porous material into a solid mass is referred to as sintering, coming from Old German ‘sinter‘ related to the English word ‘cinder’. The process is useful for all types of materials from ceramics, metals, and plastics, and vacuum sintering is especially useful for metals like tungsten and molybdenum which have very high melting points.
Aside from Sintering, we also offer Diffusion Bonding services. This process includes two materials the customer wants to fuse together and is typically used in joining high-strength, and refractory metals like Tantalum, Tungsten, Rhenium, Molybdenum, and Niobium which are unfit for liquid fusion. It’s also perfect for materials that form quick oxides with air, as the process is completed in a vacuum. Each material is fitted into the press and ‘sandwiched’ together under tight temperature and pressure specifications.
Finally, if you need something Vacuum Hot Pressed and already know your parameters, send us a request for Toll Hot Pressing. Our technicians will load your material, and follow ramp up, down, and hold times per your instructions. Just because you don’t own a hot press doesn’t mean you can’t use one, especially when your friends with SCI!
Water Cooling System
Advanced water cooling system which reduces cooldown time on the Vacuum Hot Press,
This Centorr Vacuum unit controls and displays varaiables regarding the vacuum status within the pressing chamber.
This particular hotpress can get as hot as 1600°C, and can max out pressure at 55 tons. Our largest in house dies are 8.7" x 8.7", 14.95" x 6.56", and 12.250" dia.
Pressure & Temperature Control
This panel controls the pressure & temperature of the hot press.
SCI Engineered Materials brings years of experience and technical expertise to bear with each new customer job. We love finding ways to use our skills and knowledge to create solutions for customers which is why we always look forward to consultations with both existing and prospective customers. You can feel secure knowing that rigorous quality control and decades of research back each and every sputtering target, evaporative material, backing plate, and indium bond you receive from us.