HIGH-THROUGHPUT PREPARATION METHOD OF (Sm,T)(Fe,M)12 ALLOY BASED ON DIFFUSION MULTIPLE
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Solution Overview
Problem
The development of high-performance rare-earth permanent magnetic materials is hindered by the difficulty in precise size control, uniform dispersion, and orientation of hard and soft magnetic phases, as well as the inefficiency of traditional 'experience-guided experiment' methods.
Innovation Solution
A high-throughput method for preparing (Sm,T)(Fe,M)12 alloys using a diffusion multiple, involving the assembly of metal strips into a cuboid structure within a can, followed by vacuum electron beam welding, hot isostatic pressing, and diffusion heat treatment to achieve efficient phase formation and magnetic property optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional experience-guided experiment method is used to develop (Sm,T)(Fe,M)12 alloys, then material composition can be adjusted, but the experimental period is long and experimental efficiency is low
Solution Approach 1:
The invention segments the experimental process by dividing it into two distinct stages: a common preliminary stage where a diffusion multiple is prepared once containing all necessary element strips, and multiple parallel subsequent stages where different diffusion couples can be simultaneously prepared from the same multiple. This segmentation eliminates redundant preparation work and enables high-throughput parallel experimentation, directly resolving the contradiction between experimental efficiency and time consumption.
2Productivity
If multiple diffusion couples are prepared separately using traditional methods, then each sample can be optimized, but the preparation time and investment are large
Solution Approach 1:
The invention merges multiple diffusion couples into a single diffusion multiple structure, where all element strips (Sm, Fe, T elements, M elements) are consolidated into one integrated component. This merging allows multiple diffusion couples to be prepared simultaneously from the same multiple, dramatically increasing sample preparation throughput while reducing material consumption and experimental investment, thereby resolving the contradiction between productivity and material quantity.
3Reliability
If nanocomposite permanent magnets are prepared with hard and soft magnetic phases, then ultra-high (BH)max can be achieved, but precise size control and uniform dispersion of phases is difficult
Solution Approach 1:
The invention applies preliminary action by pre-establishing a diffusion multiple with all necessary element strips arranged in specific configurations before diffusion occurs. This pre-arranged structure ensures that during diffusion, elements automatically combine in controlled stoichiometric ratios, enabling precise control over phase composition and size. The preliminary structural arrangement guarantees uniform dispersion and reliable magnetic performance, resolving the contradiction between reliability and manufacturing precision.
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 enables the rapid preparation of a large number of samples with improved phase stability and intrinsic magnetic properties, overcoming the limitations of traditional methods and facilitating the development of high-performance rare-earth permanent magnetic materials.
Implementation Method 1
performing vacuum electron beam welding on the can and to obtain a welded can
Implementation Method 2
performing vacuum electron beam welding on the can and to obtain a welded can
Implementation Method 3
subjecting the welded can to hot isostatic pressing to obtain the diffusion multiple
Implementation Method 4
performing diffusion heat treatment after sealing to obtain the (Sm,T)(Fe,M)12 alloy based on the diffusion multiple
Data Source
AI summary
A (Sm,T)(Fe,M)12 alloy is provided, where Sm is samarium element; Fe is iron element; T is selected from the group consisting of Y, Gd, Zr, Nd, Pr, Ce and a combination thereof; and M is selected from the group consisting of Ti, Cr, Mn, Mo, Si, Al, Ga, Co, V and a combination thereof. A high-throughput method of preparing the (Sm,T)(Fe,M)12 alloy based on a diffusion multiple is further provided, in which a can, a cover, and metal strips with desired sizes are prepared, and the metal strips are arranged and loaded in the can. Then the can is subjected to vacuum electron beam welding and hot isostatic pressing to obtain the diffusion multiple, which is cut into slices, and subjected to tube sealing and heat treatment to obtain the desired (Sm,T)(Fe,M)12 alloy.