Titanium Alloy Powder Reconditioning via Gas Etching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The titanium alloy material Ti-6Al-4V forms oxides such as titania during additive manufacturing, leading to a decrease in the flexibility and toughness of printed parts, and existing methods are costly and inefficient for reconditioning or deoxidizing these oxidized alloys.
Innovation Solution
A method involving gas-phase etching and solvent extraction is used to reduce the concentration of metal oxide materials in titanium alloy materials, specifically etching the alloy using a reactive gas like chlorine to expose oxides, followed by milling and solvent processing to separate and remove the oxides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If titanium alloy powder is reused after additive manufacturing, then cost is reduced, but oxide formation decreases flexibility and toughness
Solution Approach 1:
The patent recovers oxidized titanium alloy powder from the additive manufacturing process and restores it to usable condition through deoxidization treatment. The process separates oxide contaminants from the alloy powder, enabling multiple reuse cycles while maintaining material properties and reducing waste.
Solution Approach 2:
The patent changes the chemical composition parameters of the titanium alloy powder by reducing oxide content through controlled chemical reactions. By adjusting parameters such as hydrogen peroxide concentration, processing time, and temperature, the material is transformed from an oxidized state to a deoxidized state suitable for reuse.
2Productivity
If oxide concentration is reduced through deoxidization, then material reusability is improved, but processing time and complexity increase
Solution Approach 1:
The patent replaces complex mechanical separation methods with chemical treatment processes. Instead of using elaborate mechanical systems to physically separate oxides from powder, the invention uses chemical reactions (hydrogen peroxide treatment followed by acid washing) to dissolve and remove oxides more efficiently.
Solution Approach 2:
The patent uses hydrogen peroxide as an intermediary chemical agent to facilitate the removal of oxides. The hydrogen peroxide acts as a mediator that reacts with oxide layers to form soluble compounds, which are then easily removed in subsequent washing steps, simplifying the overall separation process.
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 method effectively reconditions the titanium alloy by reducing oxide concentrations to undetectable levels, making the material suitable for reuse in additive manufacturing while minimizing costs associated with replacing the alloy.
Implementation Method 1
etching the metal material using a reactive gas to expose one or more metal oxide materials
Implementation Method 2
processing the etched metal material in a solvent and extracting the exposed one or more metal oxide materials
Data Source
AI summary
Aspects disclosed herein include a method for deoxidization of a metal material comprising one or more metal oxide materials, the method comprising: reducing a concentration of the one or more metal oxide materials in the metal material from an initial concentration to a final concentration, thereby forming a deoxidized metal material; wherein the step of reducing comprises: etching the metal material using a reactive gas to expose one or more metal oxide materials; and separating the exposed one or more metal oxide materials from the etched metal material; wherein the step of separating comprises: processing the etched metal material in a solvent and extracting the exposed one or more metal oxide materials.