Mechanical Silicon Phosphorous Blend Brazing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current joining methods for high-melting-point alloys are complex and costly, requiring multiple process steps and specialized forms of braze fillers, which complicates the joining process and increases costs.
Innovation Solution
A mechanical blend of silicon and phosphorous sources, acting as melting point depressants, is applied to substrates as a paste or dispersion, forming a braze alloy layer with a lower melting point than the parent material, allowing for simplified joining and reduced costs by eliminating the need for multiple braze fillers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional brazing methods with multiple braze fillers are used, then joining reliability is improved, but process complexity and cost increase
Solution Approach 1:
The patent combines multiple braze filler materials into a single composite braze filler that contains both Ni-P and Ni-B phases. This merging of previously separate filler materials into one integrated composition simplifies the brazing process while maintaining the reliability benefits of multiple filler types, directly resolving the contradiction between joining reliability and process complexity
Solution Approach 2:
The composite braze filler is designed to perform multiple functions simultaneously: it provides both Ni-P and Ni-B phases for different joining requirements, enables brazing of various base materials with different melting points, and achieves both strong joint formation and gap filling capability. This multi-functionality eliminates the need for multiple specialized fillers, reducing process complexity while maintaining reliability
2Adaptability or versatility
If multiple braze fillers are used for different base materials, then joining versatility is improved, but cost and process complexity increase
Solution Approach 1:
The composite braze filler is engineered to be universally applicable to multiple base materials including nickel-based superalloys, cobalt-based alloys, and iron-based alloys. By incorporating both Ni-P and Ni-B phases with complementary properties, a single filler composition can adapt to different base material requirements, eliminating the need for multiple specialized fillers and reducing manufacturing costs
Solution Approach 2:
The patent adjusts the compositional parameters of the composite braze filler, specifically controlling the ratios of Ni-P and Ni-B phases and the content of melting point depressants, to achieve optimal performance across different base materials. This parameter optimization allows one filler composition to serve multiple joining applications, enhancing versatility while controlling cost
3Ease of operation
If conventional brazing fillers are used, then process simplicity is maintained, but joint quality and parent material content in joint are reduced
Solution Approach 1:
The patent merges Ni-P and Ni-B filler systems into a single composite material that maintains the simplicity of using one filler while incorporating the benefits of both filler types. The composite structure provides improved joint quality with high parent material content through the synergistic interaction of Ni-P and Ni-B phases, without complicating the application process
4Strength
If high melting point base materials are joined, then material strength is improved, but joining temperature requirements increase process complexity
Solution Approach 1:
The patent modifies the thermal parameters of the brazing process by incorporating melting point depressants (B, Si, Mn) into the composite braze filler. This lowers the brazing temperature range required for joining high melting point superalloys, making temperature control more manageable while preserving the strength benefits of joining high-performance materials
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the joining process, reduces costs, and enables the creation of joints with high levels of parent material within the joint, while providing a braze alloy with properties different from the parent material, suitable for various applications such as heat exchangers and reactors.
Implementation Method 1
A mechanical blend of silicon and phosphorous sources, acting as melting point depressants, is applied to substrates as a paste or dispersion, forming a braze alloy layer with a lower melting point than the parent material
Implementation Method 2
forming a braze alloy layer with a lower melting point than the parent material, allowing for simplified joining
Implementation Method 3
a liquid phase will form in situ between two surfaces in contact with each other. In either case, the filler metal diffuses into the base material
Implementation Method 4
extensive diffusion of the filler metal elements into the base material must occur. During this stage there is solid-liquid interaction, which is accompanied by substantial mass transfer
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention relates to a blend of at least one phosphorous source and at least one silicon source, wherein silicon and phosphorous together are present in the blend in at least 25 wt%, and wherein the blend is a mechanical blend of powders, wherein each particle in the blend is either a phosphorous source particle or a silicon source particle. The present invention relates further to a composition comprising the blend a substrate applied with the blend, a method for providing a brazed product, and uses.