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

Intermatallic nickel-aluminum compound/zirconium oxide ceramic composite material and preparation method thereof

A technology of intermetallic compounds and zirconia ceramics, which is applied in the field of materials science, can solve the problems of small improvement and achieve the effect of improving bending strength, hardness and comprehensive performance

Inactive Publication Date: 2009-12-30
SHANDONG UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of the intermetallic compound phase improves the ZrO 2 The comprehensive properties of ceramics, even so, are still unsatisfactory in some harsh conditions.
The Chinese patent No. 1398819A "iron-aluminum intermetallic compound / zirconia ceramic composite material and its preparation method" discloses a 3 Al, FeAl, ZrO 2 The improved ceramic matrix composites have improved flexural strength and fracture toughness, but the improvement is small

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

[0016] First, 6.45 kg of nickel powder and 8.55 kg of aluminum powder were ball milled in a ball mill for 50 hours, and then ZrO 2 85 kg of powder, mixed mechanically at 60 rpm for 2 hours, sieved with a 200-mesh sieve after vacuum drying, and hot-pressed and sintered at a temperature of 1400 ° C at 30 MPa; the obtained composite material has a hardness of 70 (HRC), bending resistance The strength is 880MPa.

Embodiment 2

[0018] Mill 12.9 kg of nickel powder and 17.1 kg of aluminum powder in a ball mill for 40 hours, then add ZrO 2 70 kilograms of powders were mechanically mixed at 60 rpm for 4 hours, and sieved with a 200-mesh sieve after vacuum drying. Hot pressing and sintering at 1500° C. and 30 MPa; the hardness of the composite material obtained is 75 (HRC), and the bending strength is 900 MPa.

Embodiment 3

[0020] 6.45 kilograms of nickel powder, 8.55 kilograms of aluminum powder and ZrO 2 85 kilograms of powder are added into a ball mill at the same time and ball milled for 50 hours, sieved with a 200-mesh sieve after vacuum drying, and hot-pressed and sintered at a temperature of 1450° C. and 30 MPa. The obtained composite material has a hardness of 80 (HRC) and a flexural strength of 950 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

PropertyMeasurementUnit
flexural strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
Login to View More

Abstract

The present invention relates to the ceramic material technical field and relates to Ni-Al intermetallic compound / ZrO2 ceramic composite material with high strength and high tenacity and the preparation method for the same. The composite material comprises 15~45 wt.% of Ni-Al intermetallic compound and 85~55 wt.% of ZrO2. The preparation method comprises the steps of that the nickel powder and the aluminum powder are mixed with each other and is processed by ball milling to form a mixture with the host lattice of Ni3Al and NiAl; then ZrO2 is added and the ball milling process is executed, then the powder passes through the screen of 200 mesh to obtain the mixed powder which is hot pressing sintering, in vacuum or in the presence of nitrogen gas, at 1300~1500 DEG C and 25~40 MPa for 1 hour and then thermal insulation and pressure insulation are executed for 20~30 minutes. The ceramic composite material can improve the combination property of ZrO2 ceramic, wherein the rigidity is improved by 30% and the bending strength is improved by 50%.

Description

Technical field: [0001] The invention relates to a composite material, in particular to a composite material with zirconia ceramics as a matrix and a nickel-aluminum intermetallic compound as a reinforcement and a preparation method thereof, belonging to the field of materials science. Background technique: [0002] ZrO 2 Among oxide ceramics, it has high room temperature strength and toughness, and is known as "ceramic steel". However, zirconia ceramics and their composites have two disadvantages. One is that the aging effect in humidity and medium and low temperature environments will lead to a gradual decline in mechanical properties; Toughness decreases sharply with increasing temperature. Yttria-stabilized tetragonal zirconia (Y-TZP) has a series of excellent mechanical properties such as high strength, high fracture toughness, and good wear resistance, and is regarded as the best among ceramic structural materials. However, when Y-TZP is used for a long time in the ...

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): C04B35/48C04B35/626C04B35/64
Inventor 孙康宁庞来学孙昌任帅
Owner SHANDONG UNIV