Encapsulated Metal Powder for Moisture-Stable Additive Manufacturing
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Solution Overview
Problem
Additive manufacturing processes face challenges with metal powder re-adsorbing moisture during storage and transportation, leading to defects in the final parts due to the need for additional degassing, which increases manufacturing time and cost.
Innovation Solution
Discrete particles with a metal powder core encapsulated in a non-metal coating that prevents moisture adsorption and decomposes or volatilizes to expose the core, allowing for effective additive manufacturing without compromising the core material's properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If metal powder is degassed to remove entrained gases and moisture, then manufacturing defects are reduced, but manufacturing time and cost increase due to additional degassing requirements
Solution Approach 1:
The metal powder core is pre-degassed before encapsulation in the non-metal coating. This preliminary degassing action ensures that gases and moisture are removed in advance, eliminating the need for additional degassing steps during storage and manufacturing, thereby reducing manufacturing time while maintaining part quality
Solution Approach 2:
A non-metal coating is introduced as an intermediary barrier between the degassed metal powder core and the ambient environment. This coating prevents re-adsorption of moisture and gases during storage and handling, maintaining the degassed state without requiring continuous degassing equipment or processes
2Manufacturing precision
If metal powder is stored in controlled environments to prevent moisture re-adsorption, then part quality is maintained, but device complexity and manufacturing cost increase
Solution Approach 1:
The non-metal coating serves as a protective intermediary layer that encapsulates the metal powder core, preventing direct contact with ambient moisture and gases. This eliminates the need for complex controlled environment storage systems, vacuum chambers, or inert atmosphere equipment, thereby reducing device complexity while maintaining part quality
Solution Approach 2:
The invention changes the surface properties of the metal powder by encapsulating it in a non-metal coating with low permeability to moisture and gases. This parameter change in surface characteristics allows the material to be stored in ambient conditions without compromising quality, avoiding the need for complex storage infrastructure
3Ease of operation
If degassed metal powder is exposed to air during storage and loading, then handling flexibility is improved, but moisture re-adsorption occurs requiring additional degassing
Solution Approach 1:
The non-metal coating acts as a protective intermediary that allows the degassed metal powder core to be handled and stored in ambient air without moisture re-adsorption. This enables flexible handling operations during loading and storage while maintaining the degassed state and part quality, eliminating the trade-off between handling flexibility and quality
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 prevents moisture-related defects, enabling the storage and processing of metal powder outside controlled environments, reducing manufacturing time and costs while maintaining the integrity of the final parts.
Implementation Method 1
The coating is adapted to prevent the core from adsorbing moisture
Implementation Method 2
The coating is also adapted to decompose and/or volatize to expose the core
Implementation Method 3
The coating is also adapted to decompose and/or volatize to expose the core
Implementation Method 4
At least the cores of the particles are adapted to be solidified together by the manufacturing system to form the part
Data Source
AI summary
Material is provided for forming a part using a manufacturing system. The material includes a plurality of discrete particles. Each of the particles includes a metal powder core encapsulated by a non-metal coating. At least the cores of the particles are adapted to be solidified together by the manufacturing system to form the part.