Vacuum Brazing Services
With more than 50 years of manufacturing experience.
Elcon Precision provides advanced vacuum brazing services for aerospace, defense, semiconductor, industrial, medical, and energy applications.
Using experience, advanced vacuum furnace capabilities, and comprehensive in-house support services, we produce clean, hermetic, and highly repeatable brazed joints for mission-critical environments.
Our vacuum brazing process is designed for applications where oxidation, contamination, dimensional instability, or weak joints cannot be tolerated. From ceramic-to-metal assemblies to complex metal-to-metal components, Elcon supports high-reliability manufacturing with strong process control, engineering collaboration, and rigorous quality verification.
Vacuum brazing is one of the controlled joining processes Elcon uses to produce precision brazed assemblies, hermetic components, and complex assemblies for demanding operating conditions. For finished assembly manufacturing, visit our brazed assembly services.
What Is Vacuum Brazing?
During the process, a brazing filler metal melts and flows into the joint by capillary action. This creates a strong metallurgical bond without melting the base materials. Because the process occurs in a vacuum environment, vacuum brazing can produce clean, flux-free joints with excellent dimensional stability and minimal post-braze cleaning.
Vacuum brazing is well suited for:
- High-purity assemblies
- Hermetic components
- Complex or multi-joint assemblies
- Tight-tolerance applications
- Dissimilar material joining
- High-temperature operating environments
- High-vacuum components
- Sensitive electronic and semiconductor assemblies
Our Vacuum Brazing Process
Elcon’s engineering team evaluates each application based on material type, part geometry, joint design, thermal expansion requirements, metal surfaces, ceramic surfaces, filler metal selection, and final operating environment.
Using controlled vacuum furnace processing, Elcon joins metal components and ceramic-to-metal assemblies in an environment designed to minimize oxidation and contamination. Uniform heating, controlled thermal profiles, and precise fixturing help support consistent brazed joints across prototype and production programs.
Depending on the application, Elcon may also support related joining and preparation steps, including ceramic metallization, plating, glazing, cleaning, fixture machining, laser welding, TIG welding, and spot welding.
For broader joining capabilities, visit our precision brazing services.
Why Choose Vacuum Brazing?
Vacuum brazing offers significant advantages for components that require cleanliness, repeatability, hermeticity, and structural integrity.
The process is especially useful for complex geometries, dissimilar materials, tight-tolerance assemblies, and components with multiple joints. Because parts are heated uniformly in a vacuum furnace, vacuum brazing can reduce distortion while supporting strong, consistent bonds across the assembly.
Key advantages include:
- Clean, flux-free brazed joints
- Minimal oxidation and contamination
- Strong metallurgical bonds
- Excellent hermetic performance
- Minimal distortion
- Good dimensional stability
- Support for complex geometries
- Repeatable production quality
- Reduced post-processing
Vacuum Brazing for Hermetic Assemblies
Elcon specializes in vacuum brazing applications that require high hermeticity and leak-tight performance. Our vacuum braze processes are used to support ceramic-to-metal and metal-to-metal assemblies for high-vacuum, high-voltage, controlled-environment, and mission-critical applications.
Vacuum brazed assemblies are commonly used in components such as feedthroughs, vacuum interrupters, microwave-transmitting tubes, power grid tubes, RF components, semiconductor equipment, and advanced electronics.
To help verify assembly integrity, Elcon supports testing and inspection procedures including helium leak testing, vacuum leak testing, joint strength testing, XRF, cross sections, and 160 kV X-ray inspection.
Benefits
- Clean, flux-free joints
- High hermeticity
- High repeatability
- Minimal oxidation
- Minimal part-to-part variation
- Strong metallurgical bonds
- Excellent dimensional stability
- Support for complex geometries
- Reduced post-processing
- Greater quality control
Capabilities
- Vacuum brazing
- Vacuum furnace brazing
- Ceramic-to-metal vacuum brazing
- Metal-to-metal vacuum brazing
- Multi-joint brazing
- Controlled thermal processing
- Brazing filler metal selection
- Braze alloy selection
- In-house metallizing, plating, and glazing
- In-house machining of fixtures
- Prototype and production support
- Temperature range: 300°C to 1200°C
- Maximum part diameter:
- Vacuum furnace: 8 in.
- Maximum part length:
- Vacuum furnace: 9 in.
- Testing:
- Helium leak performance
- Vacuum leak testing up to 10⁻¹⁰ Torr
- Joint strength
- XRF
- Cross sections
- 160 kV X-ray inspection
Specifications
View applications for vacuum brazing, the materials we use, example products, equipment, standards, and more below.
