Inductive Metal Feed Deposition for Refractory Layer Uniformity

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Solution Overview

Problem

Existing metal deposition technologies struggle with the reliable and cost-effective deposition of refractory materials due to the high temperatures and mechanical forces required, often leading to damage to the deposition system and substrates, and result in low-quality, uneven layers.

Innovation Solution

A system utilizing a ceramic collar and induction coils to locally heat metal feedstock near the deposition point, minimizing heat transfer to the system components and allowing precise, layer-by-layer deposition of refractory materials with reduced mechanical force.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If conventional heating methods are used to deposit refractory materials, then the required high temperatures can be achieved, but the substrate and system components suffer from thermal damage

Engineering Contradiction:

Improveheating temperatureVSAvoidthermal damage to substrate

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The induction coil is positioned to heat only the immediate deposition zone where metal feedstock contacts the substrate, creating a localized high-temperature region. This allows the substrate to remain at lower temperatures while the deposition area reaches the necessary high temperatures for refractory material bonding.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Metal feedstock acts as an intermediary that transfers thermal energy from the induction-heated zone to the substrate. The molten or softened metal serves as a thermal mediator, enabling high-temperature deposition without directly exposing the substrate to extreme heat sources.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Force

If large mechanical forces are applied to deposit metal feedstock, then deposition can be achieved, but the system complexity and cost increase

Engineering Contradiction:

Improvemechanical force for depositionVSAvoidsystem complexity

Core Design Contradiction:

ForceVSDevice complexity

Solution Approach 1:

Thermal energy from inductive heating replaces mechanical forcing mechanisms. The heat-induced softening or melting of metal feedstock enables spontaneous flow and adhesion to the substrate, eliminating the need for complex mechanical pressing, rolling, or sintering systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The physical state of metal feedstock is changed from solid to softened/molten state through temperature control. This parameter change enables the metal to conform to the substrate surface and bond naturally, replacing the need for high mechanical forces and complex deposition equipment.

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If conventional deposition methods are used, then material can be deposited, but the layer quality is uneven and low

Engineering Contradiction:

Improvelayer uniformityVSAvoiddeposition quality

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The system dynamically controls the interaction between moving metal feedstock and the stationary induction coil. By coordinating the feedstock movement speed with the heating rate and substrate feed rate, uniform thermal processing is achieved along the entire deposition path, ensuring consistent layer quality.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system monitors deposition parameters such as temperature, feedstock flow rate, and substrate movement to maintain optimal conditions. This feedback control ensures consistent heating and deposition rates, producing uniform layers with high manufacturing precision.

Inventive Principle:

Principle #23Feedback

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

Enables controlled, high-quality deposition of refractory materials on substrates with lower softening temperatures, reducing system complexity and cost while maintaining substrate integrity.

Implementation Method 1

at least one induction coil disposed adjacent to the ceramic collar and configured to heat a portion of the metal feedstock within the ceramic collar

Methodology Applied

Scientific EffectInductive heating: Induction Heating

Implementation Method 2

a large mechanical force may be applied to generate friction where a metal source contacts a substrate. This friction heats the metal source

Methodology Applied

Scientific EffectFriction heating: Friction

Data Source

PatentUS20250303491A1System and method for metal forming and layering using inductive heating

Publication Date: 2025.10.02 LOCKHEED MARTIN CORP

AI summary

The present disclosure is directed, in certain embodiments, a system for depositing material from a metal feedstock. The system includes a feedstock guide configured to guide a metal feedstock from a material feeder to extend beyond a terminal end of the feedstock guide. The system includes a ceramic collar disposed at the terminal end of the feedstock guide and configured to guide the metal feedstock extending from the terminal end of the feedstock guide to a deposition outlet of the ceramic collar. An induction coil disposed adjacent to the ceramic collar and configured to heat a portion of the metal feedstock within the ceramic collar, such that material of the metal feedstock can be deposited on a surface from the deposition end of the ceramic collar.