Nano-Dual-Phase Glass-Crystal Metal Material
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Solution Overview
Problem
Existing materials struggle to achieve theoretical strength due to limitations in dislocation control and defects, leading to reduced mechanical properties, especially when grain size is reduced below 10 nm, causing reverse Hall-Petch effects and shear band softening.
Innovation Solution
A nano-dual-phase glass-crystal (NDP-GC) structure with crystalline and amorphous phases, where nanocrystalline phases are embedded in amorphous shells, inhibiting dislocation motion and grain boundary sliding, fabricated using magnetron sputtering with a magnesium alloy target, achieving a 3D homogeneous structure with high strength and low modulus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If grain size is reduced to increase strength, then material strength increases, but reverse Hall-Petch effects and shear band softening occur
Solution Approach 1:
The invention employs a composite material structure consisting of nanocrystalline phases embedded in an amorphous matrix. This composite architecture combines the high strength of nanocrystalline regions with the defect-tolerance of the amorphous phase, achieving theoretical strength while preventing the reverse Hall-Petch effect and shear band softening that plague single-phase nanomaterials.
Solution Approach 2:
The invention applies local quality by creating distinct regions with different structural characteristics - nanocrystalline domains provide strength while the surrounding amorphous matrix provides defect tolerance. This spatial differentiation of material properties allows each phase to fulfill its specific function, resolving the contradiction between strength and reliability.
2Strength
If dislocation control is improved to increase strength, then material strength increases, but defects and structural limitations reduce mechanical properties
Solution Approach 1:
The invention utilizes phase transitions by incorporating both crystalline and amorphous phases in a controlled dual-phase structure. The amorphous phase acts as a defect-absorbing matrix that accommodates structural imperfections, while the nanocrystalline phase maintains high strength. This phase transition approach allows the material to achieve theoretical strength without being constrained by manufacturing-induced defects.
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 NDP-GC material achieves theoretical strength of 3.3 GPa and high hardness, overcoming size-dependent strength limitations and enabling large-area fabrication for applications in high-strength MEMS, surface coatings, and 3D printing.
Implementation Method 1
fabricated using magnetron sputtering with a magnesium alloy target
Data Source
AI summary
A metal material including a plurality of metal particles arranged in a crystal structure having at least two phases; wherein the at least two phases include a crystalline phase and an amorphous phase, wherein the crystalline phase includes a nanocrystalline phase and the amorphous phase includes a nanoamorphous phase.