Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for adulterating adjuvant, hot-pressing sintered block titanium silicon carbide ceramic material

A technology for hot-pressing sintering and titanium silicon carbide is applied in the field of hot-pressing sintering layered titanium silicon carbide bulk materials mixed with an additive CaF2, which can solve the problems of difficulty in synthesizing titanium silicon carbide, difficulty in development and utilization, etc., and achieves low cost, Accelerates solid-phase reactions, improves purity and density

Inactive Publication Date: 2006-01-04
万青
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of titanium silicon carbide is relatively difficult. The CVD (chemical vapor deposition) method can only prepare a small amount of Ti in the laboratory. 3 SiC 2 thin film, it is difficult to further develop and utilize

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

[0022] The molar ratio is Ti:Si:C=3:1:1.95 and 5wt% CaF is added 2 100 g of the mixed powder was densely put into a graphite mold and sintered under an Ar protective atmosphere. The heating rate is 50°C / min, the sintering temperature is 1300°C, the pressure is 30MPa, and the temperature is kept for 2 hours. The density of the bulk material is 99%, Ti 3 SiC 2 The content is 97.1wt.%. Compressive strength ≥ 800MPa, three-point bending strength σ h ≥420MPa,K IC ≥5MPa·m 1 / 2 .

Embodiment 2

[0024] The molar ratio is Ti:Si:C=3:1:2.05 and 3wt% CaF 2 200 grams of mixed powders were put into a graphite mold densely and sintered under an Ar protective atmosphere. The heating rate is 50°C / min, the sintering temperature is 1400°C, the pressure is 60MPa, and the temperature is kept for 6 hours. The density of the bulk material is 99.7%, Ti 3 SiC 2 The content is 98.5wt.%. Compressive strength ≥ 800MPa, three-point bending strength σ h ≥500MPa, K IC ≥5MPa·m 1 / 2 .

[0025] The compressive strength, three-point flexural strength and fracture toughness of the above materials were tested on INSTRON-1195 universal material testing machine. During the three-point bending strength test, the loading rate of the test strip is 0.5mm / min, and the span is 25mm. The fracture toughness is measured by the unilateral notched beam method, the notch is in the middle of the length direction of the test bar, the depth is 2.5mm, the support span is 20mm, and the loading rate is 0.5mm / ...

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

PropertyMeasurementUnit
compressive strengthaaaaaaaaaa
bending strengthaaaaaaaaaa
bending strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses an approach of producing hot pressing sintering massif ti-carborundum ceramic material by mixing into auxiliary agent which is CaF2. The invention relates to home position hot pressing sintering method. Its step are as follows: A: making Ti: Si: C=3:1: (1.95-2.05) and adding CaF2 of 2-8 percent; B: blending A for 24-30h; C: loading even fine material into graphite mould, hot pressing sintering for 1-8h in 1200-1500deg.C and pressure of 20-80MPa under protection of inert gases; D: naturally cooling under protection of inert gases. Innovations of the invention is adding CaF2 to low sintering temperature, speed up solid state reaction and improve fineness and density of production. With simpleness, reliability, low cost and high yield, it adapts to industrial product in large scale.

Description

technical field [0001] The invention relates to the preparation of bulk titanium silicon carbide ceramic materials, and in particular provides a CaF doping additive 2 Method for hot pressing and sintering layered titanium silicon carbide bulk materials. Background technique [0002] Titanium silicon carbide (Ti 3 SiC 2 ) is an excellent high-temperature structural / functional material, which has electrical conductivity, thermal conductivity, high-temperature plasticity and processability like metal, and has high strength, high density, good high-temperature stability and high-temperature Antioxidant properties, etc. However, the synthesis of titanium silicon carbide is relatively difficult. The CVD (chemical vapor deposition) method can only prepare a small amount of Ti in the laboratory. 3 SiC 2 thin film, it is difficult to further develop and utilize. Synthesis of High Purity Ti by Solid State Reaction Method 3 SiC 2 It is an active topic for ...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/575C04B35/577C04B35/645
Inventor 万青
Owner 万青