Metal alloy nano-stick or nano-wire manufactured with Laves phase hydrogenation method and process thereof

A technology of metal alloys and nanorods, which is applied in the field of metal alloy nanorods or nanowires prepared by Laves phase hydrogenation, can solve the problems that the strength potential of metal materials is not fully utilized, and achieve unique magnetic properties, high melting point and hardness Effect

Inactive Publication Date: 2008-12-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the strength potential of metallic materials is far from being fully realized, a...

Method used

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  • Metal alloy nano-stick or nano-wire manufactured with Laves phase hydrogenation method and process thereof
  • Metal alloy nano-stick or nano-wire manufactured with Laves phase hydrogenation method and process thereof
  • Metal alloy nano-stick or nano-wire manufactured with Laves phase hydrogenation method and process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ti 0.5 Zr 0.5 (Mn 0.5 Cr 0.5) 2 Alloy (alloy composition is atomic percentage, at.%, the same below).

[0032] The commercial metal elements titanium, zirconium block and manganese, chromium flakes are used as starting materials, and the element purity is higher than 99.9%. According to the nominal composition of Ti 0.5 Zr 0.5 (Mn 0.5 Cr 0.5 ) 2 After being formulated into an alloy, it is repeatedly smelted three times in a magnetron electric arc furnace protected by a high-purity Ar (99.999%) atmosphere to produce an alloy ingot with a weight of about 50 grams. The alloy ingot was sealed into an argon-protected quartz tube and annealed at 900°C for 72 hours. Then the quartz tube was air-cooled to room temperature, and the alloy ingot was taken out. Remove the sample of about 0.5 gram from the alloy ingot, mechanically grind it into a finer powder, do X-ray diffraction analysis, show that the alloy is a single hexagonal Laves phase structure (see X-ray diffrac...

Embodiment 2

[0034] Ti 0.1 Zr 0.9 (Mn 0.5 Cr 0.5 ) 2 alloy.

[0035] The commercial metal elements titanium, zirconium block and manganese, chromium flakes are used as starting materials, the purity of the elements is higher than 99.9%, and the nominal composition is formulated as Ti 0.1 Zr 0.9 (Mn 0.5 Cr 0.5 ) 2 alloy, which is then smelted into alloy ingots weighing about 50 grams. Alloy ingot melting method and heat treatment method are the same as embodiment 1. Remove about 0.5 gram of sample from the treated alloy ingot, mechanically grind it into a finer powder, and do X-ray diffraction analysis, showing that the alloy is a single hexagonal Laves phase structure (see X-ray diffraction spectrum). figure 1 (b)). Take about 1 gram of Ti 0.1 Zr 0.9 (Mn 0.5 Cr 0.5 ) 2 The alloy is activated to absorb hydrogen in a self-made hydrogen reactor at room temperature and a hydrogen pressure of 1 atm, and the activation process is the same as in Example 1. After the alloy is full...

Embodiment 3

[0037] Zr(Mn 0.5 Cr 0.5 ) 2 alloy.

[0038] Using commercial metal elements titanium, zirconium block and manganese, chromium flakes as starting materials, the purity of the elements is higher than 99.9%, and the nominal composition is formulated as Zr (Mn 0.5 Cr 0.5 ) 2 alloy, which is then smelted into alloy ingots weighing about 50 grams. Alloy ingot melting method and heat treatment method are the same as embodiment 1. Remove about 0.5 gram of sample from the treated alloy ingot, mechanically grind it into a finer powder, and do X-ray diffraction analysis, showing that the alloy is a single hexagonal Laves phase structure (see X-ray diffraction spectrum). figure 1 (c)). Take about 1 gram of Zr(Mn 0.5 Cr 0.5 ) 2 The alloy sample was activated to absorb hydrogen in a self-made hydrogen reactor at room temperature and a hydrogen pressure of 1 atm, and the activation process was the same as in Example 1. After the alloy is fully activated, the alloy is subjected to ...

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Abstract

The invention discloses the metal alloy nano rods and nano wires which are prepared by a Laves phase hydrogenation method and a technique. The metal alloy nano rods and nano wires are characterized by being a Laves phase alloy of nanometer whisker which can produce simple-substance manganese and the alloy of the manganese. The expression formula of the alloy component is Ti1-xZrx (Mn1-yCry)2; wherein, x is equal to 0 to 1.0; y is equal to 0 to 0.9. The technique is characterized by carrying out hydrogen-charging/dehydrogenation treatment to the alloy for once to ten times, then carrying out ultrasonic vibration treatment to the sample containing little amount of hydrogen after dehydrogenation treatment in ethanol solvent and placing the sample in the air for 12 to 72 hours. The invention has the advantages of being a process technology which leads metals to grow out nanometer whisker automatically at a normal temperature under specific hydrogenation condition. The alloy whisker belongs to nanometer whisker materials and the diameter is less than 100nm; the crystal structure is novel hexagonal structure and the shape is a regular round bar or wire. The alloy whisker has high melting point, high hardness and unique magnetic performance, and is magnetic nano-material.

Description

technical field [0001] The invention relates to a class of Laves phase alloys and a unique hydrogenation process for preparing elemental manganese and manganese alloy nanorods and nanowire-like whiskers with this alloy, and particularly provides a metal alloy nanorod or nanowire prepared by a Laves phase hydrogenation method and craftsmanship. Background technique [0002] A whisker is a single crystal with a diameter of tens of nanometers to tens of microns and a length of several centimeters. In the mid-1940s, Bell Telephone Company of the United States discovered for the first time that needle-like crystals of Cd and Sn spontaneously grew from the coating of electrical equipment, which looked like cat whiskers under a microscope and were named whiskers. [0003] There are a certain number of crystal defects in general metals. Under the action of external force, as long as a few atoms move for a short distance, plastic deformation or fracture can be caused by the defects....

Claims

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Application Information

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IPC IPC(8): B22F9/22C22C1/04
Inventor 郭秀梅吴二冬
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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