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Preparation method of terrace-shaped appearance Al-Cu-Fe quasi crystal block material

A technology of al-cu-fe and bulk materials, which is applied in the field of preparation of quasi-crystal materials, can solve the problems of difficult to observe regular geometric growth morphology, provide favorable information, complex process, etc. Sensitive, process stable, process simple effect

Active Publication Date: 2016-05-25
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods are not easy to observe the regular geometric growth morphology, so it is difficult to provide people with favorable information on the fundamental issue of the formation mechanism of quasicrystals
As a parameter parallel to temperature and composition, high pressure has also been used to prepare quasicrystals in other systems in the past, but the relatively rare double-sided top press is used and the master alloy is first melted in a vacuum furnace. complex

Method used

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  • Preparation method of terrace-shaped appearance Al-Cu-Fe quasi crystal block material
  • Preparation method of terrace-shaped appearance Al-Cu-Fe quasi crystal block material
  • Preparation method of terrace-shaped appearance Al-Cu-Fe quasi crystal block material

Examples

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Effect test

Embodiment 1

[0023] In an inert gas (Ar gas) environment glove box (H 2 O2 99.9% (according to Al 57 Cu 40 Fe 3 Weigh), put it into an agate mortar and mix well, put the mixed powder into a hard alloy abrasive tool with an inner diameter of Φ9.5mm, pressurize to 3MPa on a hydraulic tablet press, hold the pressure for 2 minutes, and obtain the thickness 10mm preform.

[0024] Put the preform into the crucible combined with h-BN crucible and graphite heating element, place it in a drying box at 180°C to remove the adsorbed water vapor, and then carry out high-pressure preparation in a hinged six-sided top press. First, raise the pressure to 3GPa, control the heating rate to 50K / min, heat to 1373K, keep the temperature and hold the pressure for 30 minutes. Subsequently, the cooling rate is controlled to be 100K / min, the temperature is lowered to 1073K, and the heat preservation and pressure are maintained for 2 hours, and the Al with terraced field shape is obtained. 57 Cu 40 Fe 3 bulk...

Embodiment 2

[0027] In a vacuum environment glove box, 1.0324g of Al powder, 1.8126g of Cu powder, and 0.1554g of Fe powder with a purity>99.9% were weighed according to the atomic weight ratio (according to Al 55 Cu 41 Fe 4 Weigh), put it into an agate mortar and mix well, put the mixed powder into a hard alloy abrasive tool with an inner diameter of Φ9.5mm, pressurize to 2MPa on a hydraulic tablet press, hold the pressure for 5 minutes, and obtain the thickness 10mm preform.

[0028] Put the preform into the crucible combined with h-BN crucible and graphite heating element, place it in a drying box at 180°C to remove the adsorbed water vapor, and then carry out high-pressure preparation in a hinged six-sided top press. First, raise the pressure to 6GPa, control the heating rate to 40K / min, heat to 1273K, and hold the temperature and pressure for 60 minutes. Subsequently, the cooling rate is controlled to be 100K / min, the temperature is lowered to 973K, and the heat preservation and pr...

Embodiment 3

[0031] In an inert gas (N 2 gas) environmental glove box (H 2 O2 99.9% according to the atomic weight ratio (according to Al 52 Cu 42 Fe 6 Weigh), put it into an agate mortar and mix well, put the mixed powder into a hard alloy abrasive tool with an inner diameter of Φ9.5mm, pressurize to 4MPa on a hydraulic tablet press, hold the pressure for 3 minutes, and obtain the thickness 10mm preform.

[0032] Put the preform into the crucible combined with h-BN crucible and graphite heating element, place it in a drying oven with a temperature of 180°C to remove the adsorbed water vapor, and then carry out high-pressure preparation in a hinged six-sided top press. First, raise the pressure to 4GPa, control the heating rate to 60K / min, heat to 1300K, keep the temperature and hold the pressure for 40 minutes. Subsequently, the cooling rate was controlled to be 100K / min, the temperature was lowered to 1000K, and the heat preservation and pressure were held for 2.5 hours to obtain Al...

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Abstract

A preparation method of a terrace-shaped appearance Al-Cu-Fe quasi crystal block material mainly includes the steps of mixing and pressing 52-57% of high-purity Al powder, 40-42% of Cu powder and 3-6% of Fe powder into a prefabricated blank, putting the prefabricated blank in a crucible in a graphite composite heating body, sealing the crucible with pyrophyllite, putting the crucible in a drying box at the temperature of 180 DEG C to remove adsorbed moisture, putting the dried h-BN crucible and the graphite composite heating body in a cavity of a hinge type cubid press, conducting synthesizing at pressure of 3-6 GPa, keeping the temperature at 1273 K to 1373 K for 30-60 minutes, lowering the temperature to 973-1073 K, and keeping the temperature for 2-3 hours to obtain the terrace-shaped appearance Al-Cu-Fe quasi crystal block material. The method is simple, effective and stable in process, the prepared quasi material is dense, extremely-high condensation speed required for reaction is decreased, and the terrace-shaped appearance quasi crystal block material can be obtained within a wide component range.

Description

technical field [0001] The invention relates to a preparation method of a quasi-crystal material. Background technique [0002] Since Tsai et al first discovered the stable Al-Cu-Fe quasicrystal in 1987, people have studied this solid-state ordered phase with long-range quasi-periodic translational order and amorphous rotational symmetry from the perspectives of basic science and applied science. extensive research. However, nearly three decades of research have not yet resolved the fundamental question of how quasicrystals are formed. Various preparation methods such as melt stripping, physical chemical vapor deposition, ball milling, atomization, and pulling have been reported. However, the above-mentioned methods are not easy to observe regular geometric growth morphology, so it is difficult to provide people with favorable information on the fundamental issue of the formation mechanism of quasicrystals. As a parameter parallel to temperature and composition, high pres...

Claims

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Application Information

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IPC IPC(8): C22C9/01C22C1/04
CPCC22C1/0425C22C9/01C22C2200/06
Inventor 范长增康宇龙徐波
Owner YANSHAN UNIV
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