Additive Manufacturing Powder Coating for Reuse Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The binder jet method for additive manufacturing faces challenges in managing the reuse of additive manufacturing powders, as the coating film on the particles deteriorates with increased reuse, leading to decreased fluidity and heat resistance.
Innovation Solution
An additive manufacturing powder with a coating film containing a compound derived from a coupling agent with a hydrophobic functional group, where the Si content is between 15 atomic % and 40 atomic % as analyzed by X-ray photoelectron spectroscopy, is used to enhance the bonding capability and heat resistance of the powder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the additive manufacturing powder is reused multiple times in the binder jet method, then the productivity increases through reuse, but the coating film deteriorates and fluidity decreases
Solution Approach 1:
The patent changes the chemical composition parameters of the coating film by specifying a Si content of 15-40 atomic % and using coupling agents with specific hydrophobic functional groups. This parameter optimization enables the coating film to maintain its properties after multiple heat treatments, allowing the powder to be reused 5 times or more while maintaining fluidity and coating film integrity.
2Strength
If the number of Si atoms increases beyond 40 atomic %, then the bonding capability improves, but the sintered body density decreases
Solution Approach 1:
The patent optimizes the Si content parameter to a specific range of 15-40 atomic % through systematic parameter adjustment. This optimized range achieves the best balance between bonding capability and sintered body density, avoiding the detrimental effects of excessive Si content while ensuring sufficient bonding strength.
3Temperature
If the coating film contains compounds with high heat resistance, then the heat resistance improves, but the fluidity may deteriorate
Solution Approach 1:
The patent creates a composite coating film structure by combining Si-containing compounds with coupling agents that have hydrophobic functional groups. This composite material approach allows the coating film to simultaneously achieve high heat resistance through Si content and good fluidity through the hydrophobic functional groups, resolving the contradiction between these two properties.
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 additive manufacturing powder maintains favorable heat resistance and fluidity even after repeated heat treatments, enabling efficient reuse and production of dense, high-mechanical-strength metal sintered bodies.
Implementation Method 1
reacting a coupling agent containing a hydrophobic functional group with a surface of a modeling particle containing a metal material to form a coating film containing a compound derived from the coupling agent
Implementation Method 2
when elemental analysis by X-ray photoelectron spectroscopy (XPS) is performed on the surface of the modeling particle
Implementation Method 3
an additive manufacturing powder used for producing an additively manufactured body to be formed into a metal sintered body by sintering
Data Source
AI summary
An additive manufacturing powder used for producing an additively manufactured body to be formed into a metal sintered body by sintering includes: a modeling particle containing a metal material; and a coating film provided at a surface of the modeling particle and containing a compound derived from a coupling agent containing a hydrophobic functional group. When elemental analysis by X-ray photoelectron spectroscopy (XPS) is performed on the surface of the modeling particle, a Si content is 15 atomic % or more and 40 atomic % or less.