A method for preparing al-pd-fe two-dimensional quasicrystal particles

A technology of al-pd-fe and quasicrystal, which is applied in the field of preparation of quasicrystal particles, can solve the problems of high preparation cost, need for more equipment, complex process, etc.

Active Publication Date: 2021-05-18
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the preparation cost of experimental quasicrystal materials is expensive, the process is complicated, the operation requirements are high, and the equipment needs more

Method used

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  • A method for preparing al-pd-fe two-dimensional quasicrystal particles
  • A method for preparing al-pd-fe two-dimensional quasicrystal particles
  • A method for preparing al-pd-fe two-dimensional quasicrystal particles

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Experimental program
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Effect test

Embodiment 1

[0020] (1) Calculate and weigh high-purity Al powder, Pd powder, Fe powder raw material according to atomic proportion, its weight is respectively 0.9701g, 0.7617g, 0.2683g (according to Al 75 PD 15 Fe 10 Weighing), the above powder is placed in a mortar, fully ground and mixed evenly, and placed in a graphite crucible with an inner diameter of Φ20mm, and pressurized at 1MPa in a hydraulic tablet press for 100s to obtain a sheet pre-pressed sample with a diameter of Φ20mm;

[0021] (2) The graphite crucible is a tubular furnace body with a height of 40mm and an outer diameter of Φ50mm and an inner diameter of Φ20mm. Both ends are sealed with graphite plugs of Φ20mm and a thickness of 20mm. The graphite furnace is covered with a layer of carbon paper. The carbon paper is 63mm long and 40mm wide. On the inner side of the furnace, Φ20mm carbon paper is used at both ends to separate the graphite plug from the sample to prevent the sample from reacting with the graphite furnace un...

Embodiment 2

[0027] (1) Calculate and weigh high-purity Al powder, Pd powder, Fe powder raw material according to atomic ratio, its weight is respectively 0.7820g, 1.1018g, 0.1157g (according to Al 70 PD 25 Fe 5 Weighing), the above-mentioned powder is placed in a mortar, fully ground and mixed evenly, and placed in a graphite crucible with an inner diameter of Φ20mm, and pressurized at 1.5Mpa in a hydraulic tablet press for 80s to obtain a sheet pre-pressed sample with a diameter of Φ20mm;

[0028] (2) The graphite crucible is a tubular furnace body with a height of 40mm and an outer diameter of Φ50mm and an inner diameter of Φ20mm. Both ends are sealed with graphite plugs of Φ20mm and a thickness of 20mm. The graphite furnace is covered with a layer of carbon paper. The carbon paper is 63mm long and 40mm wide. On the inner side of the furnace, Φ20mm carbon paper is used at both ends to separate the graphite plug from the sample to prevent the sample from reacting with the graphite furna...

Embodiment 3

[0034] (1) Calculate and weigh high-purity Al powder, Pd powder, Fe powder raw material according to atomic proportion, its weight is respectively 1.0310g, 0.5422g, 0.4268g (according to Al 75 PD 10 Fe 15 Weighing), the above powder is placed in a mortar, fully ground and mixed evenly, and placed in a graphite crucible with an inner diameter of Φ20mm, and pressurized at 2Mpa in a hydraulic tablet press for 60s to obtain a thin sheet pre-pressed sample with a diameter of Φ20mm;

[0035](2) The graphite crucible is a tubular furnace body with a height of 40mm and an outer diameter of Φ50mm and an inner diameter of Φ20mm. Both ends are sealed with graphite plugs of Φ20mm and a thickness of 20mm. The graphite furnace is covered with a layer of carbon paper. The carbon paper is 63mm long and 40mm wide. On the inner side of the furnace, Φ20mm carbon paper is used at both ends to separate the graphite plug from the sample to prevent the sample from reacting with the graphite furnace...

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Abstract

A method for preparing Al-Pd-Fe two-dimensional quasi-crystal particles, the atomic ratio of the chemical composition of the Al-Pd-Fe quasi-crystal is: Al 70-75%, Pd 10-25%, Fe 5-15 %, fully and uniformly mix high-purity Al powder, Pd powder and Fe powder with a mortar, evenly distribute the mixed metal powder in the cavity of the graphite abrasive tool, pre-press on the mold tablet press, and keep 60 at 1-2MPa ‑100s, wrap a layer of carbon felt outside the graphite crucible, and then follow the steps of carbon paper, large graphite pad, carbon paper, small graphite pad, prepared graphite crucible, small graphite pad, carbon paper, large graphite pad, The carbon papers are sequentially placed in the pressure cavity of the SPS and pressed tightly, the sintering pressure is 50MPa, the temperature is raised to 1000-1100°C and kept for 10-20min, and then cooled to room temperature with the furnace. The invention has the advantages of simple process, strong operability, conventional equipment, less time consumption, and can directly use mixed raw materials to synthesize the two-dimensional quasi-crystal phase while reducing the treatment of raw materials.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to the preparation of quasi-crystal particles. Background technique [0002] Al-Pd-TM (TM is a transition metal element) series quasicrystalline phase has high hardness, low friction coefficient and strong brittleness, and the main research on its application at this stage is as a reinforcing phase of Al-based composite materials. The study found that the quasicrystalline phase formed in the rapidly solidified Al-Pd-TM alloy, even in the fully annealed state, the phase structure of the Al-Pd-TM alloy can remain unchanged, which shows that the Al-Pd-TM alloy A series of quasicrystals have stable structures. In the previous experimental research, the researchers prepared the Al-Pd-Fe two-dimensional quasi-crystalline phase by melting an appropriate amount of high-purity Al, Pd, Fe and water quenching to room temperature under an argon atmosphere, or using a high-speed rotatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C5/04C22C21/00
CPCC22C1/0416C22C1/0466C22C5/04C22C21/00C22C2200/06
Inventor 范长增李豪
Owner YANSHAN UNIV
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