Abstract:
A method for bonding components with a reactive multilayer foil, wherein during bonding, the components are held at a temperature or temperature gradient chosen to reduce thermal stress in the resulting bonded product.
Abstract:
A method for bonding components with a reactive multilayer foil, wherein during bonding, the components are held at a temperature or temperature gradient chosen to reduce thermal stress in the resulting bonded product.
Abstract:
A reactive composite structure (RCS) having selected energetic and mechanical properties, and methods of making reactive composite structures (RCSs) enabling the construction of complex parts and components by machining and forming of reactive composite materials (RCMs) without compromising the energetic or mechanical properties of the resulting reactive composite structure (RCS).
Abstract:
The present inventors have observed that in some applications of reactive composite joining there is escape of a portion of the molten joining material through the edges of the joining regions. Such escape is not only a waste of expensive material (e.g. gold or indium) but also a reduction from the optimal thickness of the joining regions. In some applications, such escape also presents risk of short circuits or even fire. In this invention, two approaches are taken toward preventing damage to surroundings by the escape of molten joining material. First, escape may be prevented by trapping or containing the molten material near the joint, using barriers, dams, or similar means. Second, escape may be reduced by adjusting parameters within the joint, such as solder composition, joining pressure, or RCM thickness.
Abstract:
An embodiment of the invention includes a method of simulating a behavior of an energy distribution within a soldered or brazed assembly to predict various physical parameters of the assembly. The assembly typically includes a reactive multilayer material. The method comprises the steps of providing an energy evolution equation having an energy source term associated with a self-propagating reaction that originates within the reactive multilayer material. The method also includes the steps of discretizing the energy evolution equation, and determining the behavior of the energy distribution in the assembly by integrating the discretized energy evolution equation using other parameters associated with the assembly.
Abstract:
An ignition trace pattern (10) on a printed circuit board (19) for conveying an initiating electrical current to a reactive multilayer foil preform (14) in a bonding region. The ignition trace (10) includes an ignition pad (11) disposed on the printed circuit board (19) adjacent to, but electrically isolated from, a bond pad (12) in the bonding region on the printed circuit board (19), a remote pad (13) disposed outside the bonding region on the printed circuit board (19) to which an electrode (16) may be electrically connected for delivering an initiating electrical current, and a trace (18) connecting the remote pad (13) and the ignition pad (11). The trace (18) is configured to conduct an initiating electrical current from the remote pad (13) to the ignition pad (11) and into any adjacent reactive multilayer foil performs (14) in electrical contact with the ignition pad (11) in the bonding region.
Abstract:
In accordance with the invention, containers or interfaces having two surfaces 201a and 201b to be joined, and a region to be sealed, are fused by providing between the surfaces 201a and 201b a thin strip or wire of RCM 102 embedded within a fusible material 101, applying pressure 205 and igniting the RCM 102. The released energy from the ignited RCM 102 results in a melting of the fusible material 101 and subsequent bonding of the fusible material 101 upon cooling to the surrounding surfaces 201a and 201b, achieving a hermetic seal there between without the use of a separate gasket component.
Abstract:
An embodiment of the invention includes a method of simulating a behavior of an energy distribution within a soldered or brazed assembly to predict various physical parameters of the assembly. The assembly typically includes a reactive multilayer material. The method comprises the steps of providing an energy evolution equation having an energy source term associated with a self-propagating reaction that originates within the reactive multilayer material. The method also includes the steps of discretizing the energy evolution equation, and determining the behavior of the energy distribution in the assembly by integrating the discretized energy evolution equation using other parameters associated with the assembly.
Abstract:
A process and apparatus for the reactive multilayer joining of components utilizing metallization techniques to bond difficult-to-wet materials and temperature sensitive materials to produce joined products.
Abstract:
A process and apparatus for the reactive multilayer joining of components utilizing metallization techniques to bond difficult-to-wet materials and temperature sensitive materials to produce joined products.