阅读说明：本技术 一种高强度金属耐磨化合物材料及其制备方法 (High-strength metal wear-resistant compound material and preparation method thereof ) 是由 刘瑞 李小燕 丁海燕 王志新 马明星 胡领学 于 2020-06-17 设计创作，主要内容包括：一种高强度金属耐磨化合物材料及其制备方法,属于无机金属化合物制备领域,其分子式为Al<Sub>x</Sub>Y<Sub>y</Sub>CuFeNiMn<Sub>p</Sub>O<Sub>q</Sub>Zr,其中0.1≤x≤1.3；0.1≤y≤1；0.1≤p≤1.3；0.1≤q≤0.5；0.02≤x/(x+y+p+q+4)<0.25；0.01≤y/(x+y+p+q+4)<0.18；0.02≤p/(x+y+p+q+4)<0.25；0.01≤q/(x+y+p+q+4)<0.10。具体步骤为：按化学式称取所需原料置于研钵中混合；将混合后的粉末装入石墨模具,放电等离子烧结炉中温压成块；将块体置于真空熔炼炉进行熔炼,真空吸铸进水冷铜模中,取出样品,即得目标化合物。本发明化合物与原料金属元素配比成分一致,其物相结构是由两种面心立方相构成的双相化合物结构；所制备化合物双相比例可调,且化合物材料致密度高、耐磨性能好；操作简便,工艺简单。(A high-strength metal wear-resistant compound material and a preparation method thereof belong to the field of preparation of inorganic metal compounds, and the molecular formula of the high-strength metal wear-resistant compound material is Al x Y y CuFeNiMn p O q Zr, wherein x is more than or equal to 0.1 and less than or equal to 1.3; y is more than or equal to 0.1 and less than or equal to 1; p is more than or equal to 0.1 and less than or equal to 1.3; q is more than or equal to 0.1 and less than or equal to 0.5; 0.02 ≤ x/(x + y + p + q +4)<0.25；0.01≤y/(x+y+p+q+4)<0.18；0.02≤p/(x+y+p+q+4)<0.25；0.01≤q/(x+y+p+q+4)<0.10. The method comprises the following specific steps: weighing the required raw materials according to a chemical formula, placing the raw materials into a mortar and mixing; putting the mixed powder into a graphite die, and carrying out warm pressing in a discharge plasma sintering furnace to form blocks; and putting the block body into a vacuum smelting furnace for smelting, carrying out vacuum suction casting in a water-cooling copper mold, and taking out a sample to obtain the target compound. The compound of the invention has the same proportioning components with the metal elements of the raw materials, and the phase structure of the compound is a two-phase compound structure consisting of two face-centered cubic phases; the prepared compound has adjustable biphase proportion, and the compound material has high density and good wear resistance; simple operation and simple process.)

1. A process for preparing the high-strength antiwear metal compound with Al as molecular formula_xY_yCuFeNiMn_pO_qZr which is a two-phase compound structure composed of two simple cubic phases, comprising the following steps:

step (1): according to the chemical formula Al_xY_yCuFeNiMn_pO_qZr, wherein x is more than or equal to 0.1 and less than or equal to 1.3; y is more than or equal to 0.1 and less than or equal to 1; p is more than or equal to 0.1 and less than or equal to 1.3; q is more than or equal to 0.1 and less than or equal to 0.5; 0.02 ≤ x/(x + y + p + q +4)<0.25；0.01≤y/(x+y+p+q+4)<0.18；0.02≤p/(x+y+p+q+4)<0.25；0.01≤q/(x+y+p+q+4)<0.10; respectively weighing required pure metal powder and adding a proper amount of yttrium oxide according to the proportion of oxygen element; and placing the raw material powder in a mortar for mixing for 20 min;

step (2): putting the powder mixed in the step (1) into a graphite die, and pressing the powder into a block body in a discharge plasma sintering furnace;

step (3) placing the block in the step (2) into a vacuum melting furnace, and when the vacuum degree reaches 1 × 10^-3And Pa, filling argon, vacuumizing again, repeatedly vacuumizing and filling argon for 3 times, then starting to smelt, repeatedly smelting for 3 times to ensure the uniformity of the material, performing vacuum suction casting in a water-cooled copper mold, and taking out a sample to obtain the target compound.

2. The method of preparing a high-strength metallic wear-resistant compound material as set forth in claim 1, wherein: the purity of the metal powder in the step (1) is higher than 99.5%, and the purity of the yttrium oxide is higher than 99.9%.

3. The method of preparing a high-strength metallic wear-resistant compound material as set forth in claim 1, wherein: the temperature of the medium temperature pressure in the step (2) is 450-600 ℃, and the pressure is 25-35 Mpa.

4. The method of preparing a high-strength metallic wear-resistant compound material as set forth in claim 1, wherein: the smelting process parameters in the step (3) are as follows: the current is 250-400A, and the action time is 30-120 s.

Technical Field

The invention belongs to the field of preparation of inorganic metal compounds, and particularly relates to a high-strength metal wear-resistant compound material Al_xY_yCuFeNiMn_pO_qZr and a preparation method thereof.

Background

The metal compound as an important alloy phase can be formed into a new lattice by a plurality of components according to a certain proportion (certain components), the new lattice is neither a lattice of a solvent nor a lattice of a solute, the crystal structure of the metal compound is complex in general, the typical characteristic is that the crystal structure type of the metal compound is different from that of any component, and the composition can be expressed by a chemical formula and is not a composition. The alloy phase is classified according to the crystal structure, and the other is a solid solution structure except a metal compound, which means that one component (solute) is dissolved in the other component (solvent, generally metal), and the characteristic is that the lattice type of the solvent (or called matrix) is not changed, and solute atoms form a substitutional solid solution by replacing part of solvent atoms or enter gaps of the lattice of the solvent components to form a gap solid solution. In recent years, multi-principal element high mixed entropy compounds are hot spots of research, such as high entropy alloys, high entropy ceramics and the like. The appearance of the novel high-entropy compound can provide wider space and development potential for the traditional compound material. For metallic materials, conventional theory has considered that various components tend to form hard and brittle intermetallic compounds, thereby limiting the range of applications; however, high-entropy compound materials have attracted much attention because they have improved properties such as hardness and wear resistance, and also have plasticity, toughness, and the like. Although the reported novel multi-principal element high-entropy alloys tend to form simple crystal structures, such as: face centered cubic, body centered cubic, close packed hexagonal, and the like; but the space group or lattice constant of the alloy is obviously different from that of the face-centered cubic metal (such as aluminum, copper, gold, silver, nickel and the like) of the traditional alloy, and obviously the alloy is not of the same type as the traditional alloy; of course, the high-entropy compounds are the same, and various types of high-entropy compounds exist even if the crystal structures are the same (such as the face-centered cubic structures), which is the traditional alloyThe species are different in nature, namely different in crystal structure, lattice constant and the like from the types of face-centered cubic aluminum and copper, and are different from the types of the traditional alloy and the high-entropy alloy in nature, and the types are also different based on the crystal structure, the lattice constant and the like. The high-strength metal wear-resistant compound material Al of the invention_xY_yCuFeNiMn_pO_qZr belongs to a patent of a compound with typical structural characteristics and a novel crystal structure, but not a patent of a composition invention, and can have good hardness, wear resistance and plastic toughness. Therefore, the high-strength metal wear-resistant compound material has wide market prospect by designing and preparing the high-strength metal wear-resistant compound material.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a high-strength metal wear-resistant compound material Al_xY_yCuFeNiMn_pO_qZr and a preparation method thereof.

Al provided by the invention_xY_yCuFeNiMn_pO_qThe Zr high-strength metal wear-resistant compound material is prepared by a vacuum melting method, wherein the metal compound prepared by the vacuum melting method is a two-phase compound structure consisting of two simple cubic phases (space groups are P-43m (215) and Pm-3m (221)), and the molecular formula of the metal compound is Al_xY_yCuFeNiMn_pO_qZr; the prepared compound has adjustable two-phase proportion, and the compound block has high density and good wear resistance.

The technical scheme for realizing the invention is as follows: al (Al)_xY_yCuFeNiMn_pO_qThe preparation method of the Zr compound is characterized by comprising the following specific steps:

(1) according to the chemical formula Al_xY_yCuFeNiMn_pO_qZr, wherein x is more than or equal to 0.1 and less than or equal to 1.3; y is more than or equal to 0.1 and less than or equal to 1; p is more than or equal to 0.1 and less than or equal to 1.3; q is more than or equal to 0.1 and less than or equal to 0.5; 0.02 ≤ x/(x + y + p + q +4)<0.25；0.01≤y/(x+y+p+q+4)<0.18；0.02≤p/(x+y+p+q+4)<0.25；0.01≤q/(x+y+p+q+4)<0.10; respectively weighing required pure metal powder and adding a proper amount of yttrium oxide according to the proportion of oxygen element; and mixing the raw material powder in a mortar for 20min；

(2) Putting the powder mixed in the step (1) into a graphite die, and pressing the powder into a block body in a discharge plasma sintering furnace;

(3) putting the block in the step (2) into a vacuum smelting furnace, and when the vacuum degree reaches 1 × 10^-3And Pa, filling argon, vacuumizing again, repeatedly vacuumizing and filling argon for 3 times, then starting to smelt, repeatedly smelting for 3 times to ensure the uniformity of the material, performing vacuum suction casting in a water-cooled copper mold, and taking out a sample to obtain the target compound.

The purity of the metal powder in the step (1) is higher than 99.5%, and the purity of the yttrium oxide is higher than 99.9%.

The temperature of the medium temperature pressure in the step (2) is 450-600 ℃, and the pressure is 25-35 Mpa.

The smelting process parameters in the step (3) are as follows: the current is 250-400A, and the action time is 30-120 s.

The invention has the beneficial effects that: the high-strength metal wear-resistant compound material prepared by the method has the same proportioning components with the metal elements of the raw materials, and the phase structure of the high-strength metal wear-resistant compound material is a two-phase compound structure consisting of two face-centered cubic phases; the prepared compound has adjustable two-phase proportion, high density and good wear resistance, and the hardness of the compound is improved by more than 30 percent compared with the material without rare earth elements, oxygen elements and zirconium elements; simple operation and simple process.

Drawings

Fig. 1 is an X-ray diffraction pattern of the high-strength metallic wear-resistant compound material prepared in example 1.

Detailed Description

The technical solution of the present invention is not limited to the specific embodiments listed below, and includes any combination of the specific embodiments.