The influence of composition, microstructure and firing temperature on the density, porosity, and shrinkage of new zeolite-alumina composite material

In this study, the characteristics of the production process of cemented carbide-alumina composite material made using the wet-shaping process were investigated. The production process in this study produced a green compact of composite material by repeating the wet-shaping process for the molding of each material, and it made possible the sintering of plural materials with varying sintering conditions at the same time, a process that was difficult until now. By using wet-shaping and ultra-fine powder, which have superior sintering characteristics, sintering conditions were found in which it was possible to sinter cemented carbide and alumina at the same time, with a sintering temperature of 1723 K and a sintering time of 5.4 ks. With these sintering conditions, the relative densities of the sintered compact of cemented carbide and alumina were 99.0 % and 98.9 %, respectively. It is clear that the characteristics of sintered compact made with these sintering conditions are superior. When the cemented carbide slurry and the alumina slurry were layered by repeating the wet-shaping process, a composite material was able to be produced by inserting an active brazing filler metal in the interface to improve the bondability of the cemented carbide and the alumina during the sintering. However, it was observed that the active brazing filler metal and the cobalt in the cemented carbide flowed out from the interface between the cemented carbide and the alumina in the sintered compact of the composite material.

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Processing of Alumina Reinforced Copper Metal Matrix Composite by Selective Laser Melting Technology

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.316.175 ◽

2021 ◽

Vol 316 ◽

pp. 175-180

Author(s):

R.M. Baitimerov ◽

V.A. Bykov

Keyword(s):

Composite Material ◽

Selective Laser Melting ◽

Average Particle Size ◽

Particle Diameter ◽

Weight Ratio ◽

Alumina Powder ◽

Powder Materials ◽

Average Particle ◽

Laser Melting ◽

Alumina Composite

For the development of the additive technologies it is necessary to expand the range of the used materials. One of the most promising directions is the creation of products from composite materials. In this work copper-alumina composite powder was prepared by ball milling, and used in selective laser melting, to produce a composite material. The raw powder materials consisted of the gas atomized Cu powder (with the regular spherical shape and mean particle diameter of 32 μm) and alumina powder, produced by condensation of vapor on electrostatic filter (average particle size is about 220 nm). The alumina weight ratio was 5%. Four 30x10x6 mm copper-alumina specimens were manufactured. The scanning electron microscopy was used for the analysis of composite microstructure. Obtained copper-alumina composite material has higher hardness, in comparison with cast copper (HRB is 60 and 45, respectively).

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Some characteristics of friction welded joints between particulate alumina composite material and 6061 aluminium alloy

Welding International ◽

10.1080/09507119709451949 ◽

1997 ◽

Vol 11 (3) ◽

pp. 185-191

Author(s):

K Katoh ◽

H Tokisue

Keyword(s):

Composite Material ◽

Aluminium Alloy ◽

Welded Joints ◽

Alumina Composite ◽

6061 Aluminium Alloy

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Atomic structure of interface of intermetallic compound TiAl and nitride Ti2AIN using HREM and image processing

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100087161 ◽

1991 ◽

Vol 49 ◽

pp. 570-571

Author(s):

E. Sukedai ◽

H. Mabuchi ◽

H. Hashimoto ◽

Y. Nakayama

Keyword(s):

Mechanical Properties ◽

Image Processing ◽

Composite Material ◽

Intermetallic Compound ◽

Side Surface ◽

High Resolution Electron Microscopy ◽

Hexagonal Structure ◽

Second Phase ◽

Resolution Electron ◽

Compound Tial

In order to improve the mechanical properties of an intermetal1ic compound TiAl, a composite material of TiAl involving a second phase Ti2AIN was prepared by a new combustion reaction method. It is found that Ti2AIN (hexagonal structure) is a rod shape as shown in Fig.1 and its side surface is almost parallel to the basal plane, and this composite material has distinguished strength at elevated temperature and considerable toughness at room temperature comparing with TiAl single phase material. Since the property of the interface of composite materials has strong influences to their mechanical properties, the structure of the interface of intermetallic compound and nitride on the areas corresponding to 2, 3 and 4 as shown in Fig.1 was investigated using high resolution electron microscopy and image processing.

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The microstructure of a TiB2/Ti-47 Al composite material

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100155347 ◽

1989 ◽

Vol 47 ◽

pp. 674-675

Author(s):

O. Popoola ◽

A.H. Heuer ◽

P. Pirouz

Keyword(s):

Composite Material ◽

Ion Beam ◽

Chemical Properties ◽

Intermetallic Alloys ◽

Transmission Electron ◽

Diamond Polishing ◽

Al Composite ◽

The Matrix ◽

Argon Ion ◽

And Chemical Properties

The addition of fibres or particles (TiB2, SiC etc.) into TiAl intermetallic alloys could increase their toughness without compromising their good high temperature mechanical and chemical properties. This paper briefly discribes the microstructure developed by a TiAl/TiB2 composite material fabricated with the XD™ process and forged at 960°C.The specimens for transmission electron microscopy (TEM) were prepared in the usual way (i.e. diamond polishing and argon ion beam thinning) and examined on a JEOL 4000EX for microstucture and on a Philips 400T equipped with a SiLi detector for microanalyses.The matrix was predominantly γ (TiAl with L10 structure) and α2(TisAl with DO 19 structure) phases with various morphologies shown in figure 1.

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Application of pyrometer and standard sample to determine surface temperature of studied materials

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2019-12-9-13 ◽

2019 ◽

pp. 9-13

Author(s):

V.Ya. Mendeleyev ◽

V.A. Petrov ◽

A.V. Yashin ◽

A.I. Vangonen ◽

O.K. Taganov

Keyword(s):

Composite Material ◽

Surface Temperature ◽

Relative Error ◽

Wavelength Range ◽

Standard Sample ◽

A Priori ◽

Temperature Changes ◽

Surface Temperatures ◽

Relative Errors ◽

Normal Emissivity

Determining the surface temperature of materials with unknown emissivity is studied. A method for determining the surface temperature using a standard sample of average spectral normal emissivity in the wavelength range of 1,65–1,80 μm and an industrially produced Metis M322 pyrometer operating in the same wavelength range. The surface temperature of studied samples of the composite material and platinum was determined experimentally from the temperature of a standard sample located on the studied surfaces. The relative error in determining the surface temperature of the studied materials, introduced by the proposed method, was calculated taking into account the temperatures of the platinum and the composite material, determined from the temperature of the standard sample located on the studied surfaces, and from the temperature of the studied surfaces in the absence of the standard sample. The relative errors thus obtained did not exceed 1,7 % for the composite material and 0,5% for the platinum at surface temperatures of about 973 K. It was also found that: the inaccuracy of a priori data on the emissivity of the standard sample in the range (–0,01; 0,01) relative to the average emissivity increases the relative error in determining the temperature of the composite material by 0,68 %, and the installation of a standard sample on the studied materials leads to temperature changes on the periphery of the surface not exceeding 0,47 % for composite material and 0,05 % for platinum.

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