Flow Passage Member Cold Spray Adhesion
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Solution Overview
Problem
The existing manufacturing process for members with flow passages, used in semiconductor and liquid crystal display device manufacturing, faces challenges in achieving a gap-free adhesion between the concave portions of metallic members and pipes, leading to increased thermal resistance, foreign matter entry, and pipe instability due to gaps.
Innovation Solution
A member with flow passages is designed, featuring a base member and plate-like members with convex portions, where a metal deposit layer is formed using a cold spray method to enhance adhesion between the pipe and the metallic member, utilizing materials like stainless steel and aluminum alloys to improve thermal conductivity and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pipe is placed on a concave portion of a metallic member, then the structure allows fluid flow and temperature adjustment, but gaps are generated between the pipe and metallic member leading to increased thermal resistance
Solution Approach 1:
The invention applies preliminary action by forming a metal deposit layer on the pipe surface and/or concave portion surface before assembling the pipe to the metallic member. This pre-coating with metal powder (such as aluminum, copper, or stainless steel) ensures that when the components are joined, there is already a conductive metal layer in place that will bridge any gaps, thereby maintaining thermal conductivity without requiring perfect initial contact between the pipe and metallic member surfaces
Solution Approach 2:
The metal deposit layer acts as an intermediary substance between the pipe and the metallic member. This intermediate layer fills and bridges the gaps that naturally form during assembly, providing a continuous thermal conduction path. The metal powder coating serves as a mediator that transfers thermal energy effectively across the interface, eliminating the thermal resistance that would otherwise result from air-filled gaps
2Ease of manufacture
If a pipe is placed on a concave portion of a metallic member, then the structure allows fluid flow, but gaps are generated allowing foreign matter entry and pipe instability
Solution Approach 1:
The metal deposit layer is applied in advance to the pipe and/or concave portion surfaces before assembly. This preliminary coating creates a continuous metal surface that, when joined, forms a sealed interface that prevents foreign matter from entering the gap between the pipe and metallic member, thereby eliminating the harmful effect of contamination while maintaining the simple assembly structure
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
The solution effectively reduces thermal resistance and enhances adhesion between the pipe and the metallic member, preventing foreign matter entry and pipe instability, thereby improving thermal conductivity and uniformity.
Implementation Method 1
a metal deposit layer that is formed by, while main surfaces of the flat plate portions opposite to a top of the convex portion are facing the base member, accelerating powder of metal or alloy together with a gas, and spraying and depositing the powder in a solid-phase state on a surface of the plate-like member at the top side of the convex portion and a surface of the base member
Data Source
AI summary
A member with flow passage includes: a base member; a plate-like member including two flat plate portions that are positioned at both widthwise ends and have main surfaces passing over one and the same plane, and a convex portion that is provided between the two flat plate portions and has a cross section shaped in a thickness direction so as to protrude with respect to the flat plate portions, and forming the flow passage; and a metal deposit layer that is formed by, while main surfaces of the flat plate portions opposite to a top of the convex portion are facing the base member, accelerating powder of metal or alloy together with a gas, and spraying and depositing the powder in a solid-phase state on a surface of the plate-like member at the top side of the convex portion and a surface of the base member.