CN214920480U

CN214920480U - High-efficiency discharge plasma sintering mold

Info

Publication number: CN214920480U
Application number: CN202022247484.3U
Authority: CN
Inventors: 陈曦
Original assignee: Wuxi Professional College of Science and Technology
Current assignee: Wuxi Professional College of Science and Technology
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-11-30
Anticipated expiration: 2030-10-10

Abstract

The utility model discloses a high-efficient plasma sintering mould that discharges has solved if the sample size is too big, the required pulse current intensity that provides is big more to bring the problem that equipment cost rises fast, its technical scheme main points sintering mould include outer canning, middle insulating cover, interior heating sleeve and the pressure head about the complex, the outer canning is made by graphite or carbon combined material, nevertheless does not generate heat, middle insulating cover is made by boron nitride pottery, blocks the electric current, avoids flowing through the outer canning. The inner heating sleeve is made of graphite and is used for contacting with a pressure head graphite material to form a current path and play a role in heating. The composite upper and lower pressure heads are formed by compounding graphite and boron nitride, wherein the graphite part plays a role in conducting and heating, and the boron nitride part plays a role in bearing and insulating.

Description

High-efficiency discharge plasma sintering mold

Technical Field

The utility model relates to a spark plasma sintering technical field, more specifically say, it relates to a high-efficient spark plasma sintering mould.

Background

Spark Plasma Sintering (Spark Plasma Sintering-SPS) is an advanced material Sintering technology, has the distinct characteristics of high temperature rise speed, short Sintering time, controllable tissue structure, energy conservation, environmental protection and the like, can be used for preparing metal materials, ceramic materials and composite materials, and can also be used for preparing nano block materials, amorphous block materials, gradient materials and the like, thereby being popular with the research of new materials.

The core of the SPS sintering technique is the plasma generated by the dc pulse power source used, and in the introduction of the principle, it will be generally said that: the pressure sintering method is one direct electric sintering process with on-off DC pulse current, and the on-off DC pulse current has the main functions of generating discharge plasma, discharge impact pressure, Joule heat and electric field diffusion.

However, the size of the sample which can be prepared by the discharge plasma sintering furnace is limited, because if the size of the sample is too large, the intensity of the pulse current which needs to be provided is larger, so that the equipment cost is increased rapidly, the pulse current can be used efficiently, and the sintering preparation of the sample with larger size can be realized under the smaller current intensity.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a not enough to prior art exists, the utility model aims to provide a can high-efficiently utilize pulse current, can realize the high-efficient discharge plasma sintering mould of the sintering preparation of great size sample under less current strength.

In order to achieve the purpose, the utility model provides a high-efficient discharge plasma sintering mould, including the sintering mould, the sintering mould includes outer canning, middle insulating cover, interior cover and the upper and lower pressure head of generating heat of complex, outer canning is made by graphite or carbon composite, middle insulating cover is made by boron nitride ceramic, interior cover that generates heat is made by graphite, and it is used for contacting with pressure head graphite material, forms the electric current route, the pressure head is formed by graphite and boron nitride complex about the complex.

Further setting the following steps: the sintering mold is cylindrical as a whole.

Further setting the following steps: the bottom surfaces of the composite upper and lower pressure heads are planes.

The composite upper and lower pressure heads are further arranged to be consistent with the sectional area of the inner heating sleeve.

To sum up, the utility model has the advantages of as follows: the utility model discloses a high-efficient SPS sintering mould is through setting up insulating cover in the sintering cavity, has effectively reduced the sectional area that pulse current flows through the mould, makes mould system resistance increase, and the efficiency that generates heat improves, consequently can sinter bigger size's sample under less current strength, has improved the sample size of single heat to production efficiency has correspondingly been improved.

Drawings

FIG. 1 is a schematic view of the overall internal structure of embodiment 1;

FIG. 2 is a sectional view at the point of example 1A;

FIG. 3 is a sectional view at the point of example 1B;

FIG. 4 is a sectional view at the point of example 1C;

FIG. 5 is a sectional view taken in the same direction as in example 1D.

In the figure, 1, an upper pressure head and a lower pressure head are combined; 2. an internal heating sleeve; 3. an intermediate insulating sleeve; 4. and (5) outer wrapping.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Embodiment 1, a high efficiency discharge plasma sintering mold, comprising:

as shown in fig. 1, the sintering mold comprises an outer sheath 4, a middle insulating sheath 3, an inner heating sheath 2 and a composite upper and lower pressure head 1, the outer sheath 4 is made of graphite or carbon composite material, but does not generate heat, the middle insulating sheath 3 is made of boron nitride ceramic, and the current is blocked to avoid flowing through the outer sheath 4. The inner heating sleeve 2 is made of graphite and is used for being in contact with a pressure head graphite material to form a current path and play a role in heating. The composite upper and lower pressure heads 1 are formed by compounding graphite and boron nitride, wherein the graphite part plays a role in conducting and heating, and the boron nitride part plays a role in bearing and insulating.

As shown in fig. 2, 3 and 4, the sectional areas of the upper and lower composite pressure heads 1 and the inner heating sleeve 2 are consistent in the whole current path, so that the resistance is consistent and the heating is uniform.

The whole sintering mold is cylindrical, the conductive material is high-strength isostatic pressing graphite, the insulating material is a high-temperature-resistant boron nitride ceramic material, and the bottom surface of the pressure head is a plane.

The utility model discloses a high-efficient sintering mold for discharge plasma fritting furnace includes sintering mold, and it includes upper and lower compound pressure head, interior cover 2, the middle insulation cover 3, the outsourcing cover 4 that generates heat.

The sintering die comprises an outer sheath 4, an intermediate insulating sleeve 3 and an inner heating sleeve 2, wherein the outer sheath, the intermediate insulating sleeve and the inner heating sleeve are tightly matched to form a female die together, an upper composite pressure head and a lower composite pressure head are formed by combining and processing graphite and boron nitride, the upper part of a graphite component is cylindrical, the lower part of the graphite component is round, and the graphite component and the boron nitride form a cylinder together.

When specifically using, earlier with the lower pressure head and the bed die combination of upper and lower compound pressure head, to the part raw materials of treating the sintering of packing into in the inner chamber, assemble pressure head and compaction afterwards, pack the assembling die into in the discharge plasma sintering furnace afterwards, carry out the sintering experiment, the utility model discloses can play the effect that effectively reduces sintering current, play energy-concerving and environment-protective effect.

The above-mentioned embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the present invention.

Claims

1. The utility model provides a high-efficient spark plasma sintering mould, includes sintering mould, its characterized in that: the sintering die comprises an outer sheath (4), a middle insulating sleeve (3), an inner heating sleeve (2) and a composite upper and lower pressure head (1), wherein the outer sheath (4) is made of graphite or carbon composite material, the middle insulating sleeve (3) is made of boron nitride ceramic, the inner heating sleeve (2) is made of graphite and is used for contacting with the pressure head graphite material to form a current path, and the composite upper and lower pressure head (1) is formed by compounding graphite and boron nitride; the sectional areas of the composite upper and lower pressure heads (1) and the inner heating sleeve (2) are kept consistent; the whole sintering mold is cylindrical; the bottom surface of the composite upper and lower pressure heads (1) is a plane.