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A preparation method and material for obtaining a periodic lamellar structure
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A sheet structure, periodic technology, applied in the field of preparation of periodic layered sheet structure, can solve the problems of imperfect formation system, achieve the effect of rich material system selection, simple preparation method, and protection from external damage
Inactive Publication Date: 2018-05-25
HAINAN UNIV
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[0004] The periodic lamellar structure is a very complex in-situ self-organized structure. The existing periodic lamellar structures formed by solid-solid and solid-liquid reactions are mostly discovered by accident, and their formation systems have not yet been perfected.
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Embodiment 1
[0030] Example 1: (Fe, Cr) with periodic lamellar structure 2 Preparation of B / Al material
[0031] (1) Fe, Cr, and B elements with a mass ratio of 83.5:13:3.5 are prepared by casting method containing (Fe,Cr) 2 Fe alloy of B, whose microstructure is as figure 1 As shown, it can be seen that the continuous network structure of (Fe,Cr) is distributed in the Fe alloy matrix. 2 B, among them, the coarse phase primary (Fe, Cr) 2 B, fine eutectic (Fe, Cr) 2 b.
[0032] (2) The Fe alloy is processed into a sample of a certain shape and embedded in a graphite mold.
[0033] (3) Immerse the end of the graphite mold inlaid with the sample into the pure aluminum liquid at 750 °C, and after reacting for 8 hours, quickly take the graphite mold inlaid with the sample out of the aluminum liquid, cool it in air, and after polishing, it can be used in (Fe, Cr) 2 A periodic lamellar structure is obtained on the reaction interface between B and Al liquid, such as figure 2 shown. The s...
Embodiment 2
[0034] Example 2: (Fe, Cr) with periodic lamellar structure 2 Preparation of B / Al material
[0035] (1) Fe, Cr, and B elements with a mass ratio of 83.5:13:3.5 are prepared by casting method containing (Fe,Cr) 2 Fe alloy of B.
[0036] (2) The Fe alloy is processed into a sample of a certain shape and embedded in a graphite mold.
[0037](3) Immerse the end of the graphite mold inlaid with the sample into the pure aluminum liquid at 750 °C, and after 4 hours of reaction, quickly take the graphite mold inlaid with the sample out of the aluminum liquid, cool it in air, and after polishing, it can be used in (Fe, Cr) 2 A periodic lamellar structure is obtained on the reaction interface between B and Al liquid.
Embodiment 3
[0038] Example 3: (Fe, Cr) with periodic lamellar structure 2 Preparation of B / Al material
[0039] (1) Fe, Cr, and B elements with a mass ratio of 83.5:13:3.5 are prepared by casting method containing (Fe,Cr) 2 Fe alloy of B.
[0040] (2) The Fe alloy is processed into a sample of a certain shape and embedded in a graphite mold.
[0041] (3) Immerse the end of the graphite mold inlaid with the sample into the pure aluminum liquid at 750 ° C. After reacting for 1 hour, the graphite mold inlaid with the sample is quickly taken out of the aluminum liquid, cooled in air, and can be polished in (Fe, Cr) 2 A periodic lamellar structure is obtained on the reaction interface between B and Al liquid.
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Abstract
The invention belongs to the technical field of novel materials, and discloses a preparation method and a material thereof for obtaining a periodic lamellar structure. The method comprises the following steps: immersing the MxBy type boride or the M alloy containing the MxBy type boride into the aluminum liquid for reaction, extracting, cooling, and then the MxBy type boride or the M alloy containing the MxBy type boride and the aluminum A periodic lamellar structure is obtained on the reaction interface of the liquid; wherein, M is at least one of Fe, Cr, Mn, Ti, W, Mo, Cu, Ni, Co, and C. The invention provides a material with a periodic lamellar structure obtained by the above method. The method of the present invention utilizes the reaction of MxBy type borides and aluminum to generate a periodic lamellar structure between two phases at the reaction interface, which is embedded in the M-Al intermetallic compound layer to increase the internal force of the compound layer and the metal matrix M, Effectively prevent local fractures from causing the overall fracture of the M-Al intermetallic compound layer.
Description
technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method for obtaining a periodic laminar structure and a material thereof. Background technique [0002] Osinski et al. accidentally discovered the peculiar periodic lamellar structure in 1982. After that, many researchers at home and abroad also discovered this phenomenon on the reaction interface of some special ternary or more solid-state diffusion couples. Israel's Gutman et al. in SiO 2 The solid-state diffusion reaction of the / Mg system generates periodic lamellar structures. Chen Yongchong, an associate researcher at the Institute of Metal Research, Chinese Academy of Sciences, had earlier researched on the formation of periodic lamellar structures by solid-state reactions. He successively worked in Co 2 Si / Zn, Fe 3 Si / Zn, SiO 2 / Mg, CuTi / Zn, CuTi 2 The periodic lamellar structure was found in the solid-state diffusion couple of / Zn, an...
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