Method for preparing metal and ceramic composite workpiece
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A ceramic composite and metal technology, applied in the direction of metal processing equipment, manufacturing tools, ceramic molding machines, etc., can solve the problems of easy stress, high production cost, and difficulty in meeting long-term use requirements, so as to improve the bonding strength and promote combined effect
Inactive Publication Date: 2020-01-31
CHANGZHOU GIAN TECH +1
View PDF8 Cites 4 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, due to the need to apply pressure during the sintering process, this technology has high requirements for equipment, and the production efficiency is low and the production cost is high, so it cannot be applied on a large scale
The second is mechanical connection. This process needs to design some riveting structures on the metal and ceramic substrates. The forming is difficult, and the riveting position is prone to stress, which is difficult to meet the long-term use requirements.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0023] The present invention comprises the steps:
[0024] S1, processing alumina ceramics into inserts;
[0025] S2. Ultrasonic cleaning is performed on the insert, and then preheated to 120°C;
[0026] S3, TC4 powder is mixed with binder according to the ratio of 9:1 to prepare TC4 feed; the binder is a PEG-based binder;
[0027] S4. Put the insert into the mold cavity for positioning; inject the TC4 feed into the mold cavity, and obtain a green body by injection molding;
[0028] S5, soaking the green body in pure water for 12 hours at a temperature of 50°C to obtain a degreased body;
[0029] S6, sintering the degreased body under high vacuum conditions, the sintering temperature is 1300°C, and the sintering time is 3h, and finally a metal and ceramic composite workpiece is obtained.
[0030] The bonding strength of the metal and ceramic composite workpiece prepared by the method of this embodiment is 130 MPa.
Embodiment 2
[0032] The present invention comprises the steps:
[0033] S1, processing Kovar alloy into inserts;
[0034] S2. Plasma cleaning the insert, and then preheating to 130°C;
[0035] S3, mixing glass-phase-modified zirconia ceramic powder with a paraffin-based binder in a ratio of 8.5:1 to form a ceramic feed;
[0036] S4. Put the insert into the cavity of the mold for positioning; inject the ceramic feed into the cavity of the mold, and obtain a green body by injection molding;
[0037] S5, soaking the green body in n-heptane for 13 hours at a temperature of 60°C to obtain a degreased body;
[0038] S6, sintering the degreased body under a hydrogen atmosphere, the sintering temperature is 1350° C., and the sintering time is 5 hours, and finally a metal and ceramic composite workpiece is obtained.
[0039] The bonding strength of the metal and ceramic composite workpiece prepared by the method of this embodiment is 150 MPa.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention relates to a method for preparing a metal and ceramic composite workpiece. The method comprises the following steps that S1, metal or ceramic is machined into a specific shape to serve as an insert; S2, the insert is pretreated; S3, ceramic powder or metal powder and a binder are mixed to form ceramic feed or metal feed; S4, the metal serves as the insert, the ceramic feed is injected into a mold cavity, and a composite material green body is obtained; or the ceramic serves as the insert, the metal feed is injected into the mold cavity, and a composite material green body is obtained; S5, the composite material green body is subjected to solvent degreasing in a solvent, and a degreased blank is obtained; and S6, the degreased blank is sintered in a reducing atmosphere under the temperature of 1250-1400 DEG C for 2-5h, and finally the metal and ceramic composite workpiece is obtained. According to the method, pressure does not need to be applied from the outside, the composite material green body is prepared through metal injection molding, the wettability between the metal and the ceramic is utilized, the combination of the metal and the ceramic is achieved, the requirement for sintering equipment is not high, and batch production can be achieved.
Description
technical field [0001] The invention relates to a method for preparing metal and ceramic composite workpieces. Background technique [0002] With the development of the electronics industry, the application of metal-ceramic composite materials in electric vacuum technology, semiconductor and integrated circuit industries continues to expand. At present, there are two widely used technologies. One is to coat a layer between metal and ceramics. Solder, and then apply pressure and sinter to achieve the combination of ceramic and metal, so that it has a certain mechanical strength, air tightness and heat resistance. However, due to the need to apply pressure during the sintering process, this technology has high requirements for equipment, low production efficiency, and high production costs, so it cannot be applied on a large scale. The second is mechanical connection. This process requires the design of some riveting structures on the metal and ceramic substrates. It is diffi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more