Oxygen Solid Solution Titanium Sintered Compact
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Solution Overview
Problem
Existing titanium materials face challenges in achieving a balance between high strength and ductility while maintaining low material costs, with methods like oxygen solid solution strengthening being insufficient for broader applications.
Innovation Solution
A method for producing a high-strength titanium sintered compact by dissolving oxygen atoms and metal atoms or compounds into the titanium matrix, exceeding solid solubility limits, using a process that involves mixing titanium powder with metal oxide particles, applying compression, and sintering in a solid-phase temperature region without oxygen, allowing for decomposition and solid solution formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If oxygen solid solution strengthening is used to increase tensile strength, then tensile strength exceeds 1000 MPa, but ductility becomes insufficient and plastic formability deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters by introducing a specific element (e.g., Fe at 0.01-3 mass%) in addition to oxygen (0.01-5 mass%). This compositional parameter change allows achieving tensile strength ≥1000 MPa while maintaining elongation ≥10%, resolving the contradiction between strength and ductility through multi-element solid solution strengthening
Solution Approach 2:
The patent creates a composite solid solution structure by combining multiple strengthening elements (oxygen and additional metal elements like Fe, V, Nb, etc.) within the titanium matrix. This multi-component solid solution approach achieves both high strength and adequate ductility by synergistic strengthening mechanisms
2Strength
If expensive alloying elements like vanadium, scandium, or niobium are used to strengthen titanium, then tensile strength increases, but material cost increases significantly
Solution Approach 1:
The patent replaces expensive alloying elements (vanadium, scandium, niobium) with cheaper alternatives, specifically using iron (Fe) as the primary strengthening element at 0.01-3 mass%. This substitution maintains the strengthening effect while significantly reducing material cost, making high-strength titanium more economically viable
Solution Approach 2:
The patent changes the alloying strategy by selecting low-cost elements (Fe, and alternatively V, Nb, Ta, Mo, Hf, Zr, Cr, Mn, Co, Ni, Cu, Al, Si, B, Ca, Sr, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) to achieve the required tensile strength ≥1000 MPa, thereby reducing material cost while maintaining high strength through optimized composition parameters
3Stability of the object's composition
If pure titanium is used to maintain high ductility and plastic formability, then elongation exceeds 25%, but tensile strength decreases to about 400 to 600 MPa
Solution Approach 1:
The patent modifies the compositional parameters by adding controlled amounts of strengthening elements (oxygen: 0.01-5 mass%, and additional elements like Fe: 0.01-3 mass%) to pure titanium. This parameter change transforms the material from pure titanium (400-600 MPa strength) to high-strength titanium (≥1000 MPa strength) while preserving adequate ductility (≥10% elongation)
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 approach enhances the strength and ductility of titanium materials, improving their mechanical properties and reducing material costs by incorporating additional metal atoms or compounds beyond just oxygen solid solution strengthening.
Implementation Method 1
oxygen atoms dissolved as a solute of solid solution in a crystal lattice of the titanium component
Implementation Method 2
metal atoms dissolved as a solute of solid solution in the crystal lattice of the titanium component
Implementation Method 3
a step of heating and sintering a compressed shaped compact
Data Source
AI summary
An oxygen solid solution titanium sintered compact includes a matrix made of a titanium component having an α-phase, oxygen atoms dissolved as a solute of solid solution in a crystal lattice of the titanium component, and metal atoms dissolved as a solute of solid solution in the crystal lattice of the titanium component.