scholarly journals Diffusion parameters in liquid phase sintering of the al-cu system

2002 ◽  
Vol 34 (3) ◽  
pp. 203-213 ◽  
Author(s):  
O.V. Lapshin ◽  
A.P. Savitskii ◽  
V.E. Ovcharenko
Keyword(s):  
Liquid Phase ◽  
Quantitative Determination ◽  
Liquid Phase Sintering ◽  
Volume Changes ◽  
Liquid Phases ◽  
Diffusion Parameters ◽  
Direct Problems

Within the framework of the conception of the priority of the diffusion of atoms from the liquid phase into the solid at their interface, a method of quantitative determination of diffusion parameters of interaction of solid and liquid phases by experimental curves of growth and densification of powder bodies during liquid phase sintering has been suggested. Results of the determination of diffusion parameters and volume changes of powder bodies of the Al-Cu system during sintering were produced on the basis of solution of the reverse and direct problems.

Volume changes experienced by Al-Zn compacts during liquid-phase sintering

1982 ◽  
Vol 21 (10) ◽  
pp. 760-764 ◽  
Author(s):  
A. P. Savitskii ◽  
N. N. Burtsev ◽  
L. S. Martsunova
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Volume Changes

Quantitative Determination of Benzaldehyde in Flavors by Gas-Liquid Chromatography

1963 ◽  
Vol 46 (6) ◽  
pp. 950-951
Author(s):  
Richard L Brunelle ◽  
Glenn E Martin
Keyword(s):  
Liquid Chromatography ◽  
Liquid Phase ◽  
Benzoic Acid ◽  
Quantitative Determination ◽  
Solid Support ◽  
Specific Method ◽  
Gas Liquid Chromatography ◽  
Ultraviolet Spectrophotometry ◽  
Liquid Chromatography Separation

Abstract A rapid and specific method is given for determination of benzaldehyde in the presence of interfering substances by gas-liquid chromatography. Separation is effected on a ¼ column containing 2 5% Apiezon M as the liquid phase on a solid support of Chromoport XXX (60—80 mesh) at isothermal conditions, 100°C. The determination can be performed in the presence of benzoic acid and other interfering substances. Results are compared with those obtained by ultraviolet spectrophotometry on a variety of almond and cherry flavors.

scholarly journals Sintering Mechanism, Microstructure Evolution, and Mechanical Properties of Ti-Added Mo2FeB2-Based Cermets

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1889
Author(s):  
Yupeng Shen ◽  
Zhifu Huang ◽  
Lei Zhang ◽  
Kemin Li ◽  
Zhen Cao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Liquid Phase ◽  
Rupture Strength ◽  
Liquid Phase Sintering ◽  
Maximum Hardness ◽  
Liquid Phases ◽  
Ti Content ◽  
Ti Addition

Four series of Mo2FeB2-based cermets with Ti contents between 0 wt.% and 1.5 wt.% in 0.5 wt.% increments were prepared by in situ reaction and liquid phase sintering technology. Influences of Ti on microstructure and mechanical properties of cermets were studied. It was found that Ti addition increases formation temperatures of liquid phases in liquid-phase stage. Ti atoms replace a fraction of Mo atoms in Mo2FeB2 and the solution of Ti atoms causes the Mo2FeB2 crystal to be equiaxed. In addition, the cermets with 1.0 wt.% Ti content exhibit the smallest particle size. The solution of Ti atoms in Mo2FeB2 promotes the transformation of Mo2FeB2 particles from elongated shape to equiaxed shape. With Ti content increasing from 0 wt.% to 1.5 wt.%, the hardness and transverse rupture strength (TRS) first increase and then decrease. The maximum hardness and TRS occur with 1.0 wt.% Ti content. However, the fracture toughness decreases as Ti content increases. The cermets with 1.0 wt.% Ti content show excellent comprehensive mechanical properties, and the hardness, fracture toughness, and TRS are HRA 89.5, 12.9 MPa∙m1/2, and 1612.6 MPa, respectively.

The Use of Transient Liquid Phases in Powder Metallurgy

2021 ◽  
Vol 1016 ◽  
pp. 69-76
Author(s):  
Herbert Danninger ◽  
Raquel de Oro Calderon ◽  
Christian Gierl-Mayer
Keyword(s):  
Powder Metallurgy ◽  
Liquid Phase ◽  
Transient Liquid Phase ◽  
Liquid Phase Sintering ◽  
Porous Powder ◽  
Material Transport ◽  
Liquid Phases ◽  
Short Period ◽  
Constant Quantity ◽  
Transient Liquid Phases

Liquid phase sintering is most widely known in its variant „persistent liquid phase sintering“, in which case the liquid phase is present in constant quantity during the entire isothermal period. There is however also the variant „transient liquid phase“, the melt being present only for a short period in the first stage of sintering and then solidifying through diffusional processes. In this presentation, the preconditions for both variants are presented, in particular with regard to the starting materials. The benefits of transient liquid phases are described, both for sintering – to accelerate material transport, contact formation and microstructural homogenization compared to standard solid state sintering – and for transient liquid phase bonding, a brazing variant which is an attractive method for joining porous powder compacts. Both techniques are highly useful in particular for ferrous powder metallurgy precision components, etc.

Effect of aluminum particle size on the volume changes experienced by compacts from a mixture of aluminum and copper powders during liquid-phase sintering

1986 ◽  
Vol 25 (9) ◽  
pp. 721-725 ◽  
Author(s):  
A. P. Savitskii ◽  
O. B. Afanas'ev ◽  
V. G. Gopienko ◽  
L. S. Martsunova ◽  
G. N. Romanov ◽  
...  
Keyword(s):  
Particle Size ◽  
Liquid Phase ◽  
Aluminum Particle ◽  
Liquid Phase Sintering ◽  
Volume Changes ◽  
Copper Powders

Volume changes exhibited by Cu-Al compacts during liquid-phase sintering

1982 ◽  
Vol 21 (5) ◽  
pp. 373-378 ◽  
Author(s):  
A. P. Savitskii ◽  
M. A. Emel'yanova ◽  
N. N. Burtsev
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Volume Changes

Volume changes experienced by Cu-Sn compacts during liquid-phase sintering

1983 ◽  
Vol 22 (12) ◽  
pp. 989-992 ◽  
Author(s):  
A. P. Savitskii ◽  
M. A. Emel'yanova ◽  
N. N. Burtsev
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Sintering ◽  
Volume Changes
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