Gas carburizing of steel with furnace atmospheres formedIn Situ from propane and air: Part I. The effect of air-propane ratio on furnace atmosphere composition and the amount of carburizing

1980 ◽  
Vol 11 (3) ◽  
pp. 471-479 ◽  
Author(s):  
C. A. Stickels ◽  
C. M. Mack ◽  
M. Brachaczek
Keyword(s):  
Furnace Atmosphere ◽  
Atmosphere Composition ◽  
Gas Carburizing

Effect of furnace atmosphere and silica content on the consolidation behaviour of magnesia partially stabilised zirconia

1990 ◽  
Vol 48 (4) ◽  
pp. 1056-1057
Author(s):  
J. Drennan ◽  
R.H.J. Hannink ◽  
D.R. Clarke ◽  
T.M. Shaw
Keyword(s):  
Liquid Phase ◽  
Silica Content ◽  
Liquid Phase Sintering ◽  
Furnace Atmosphere ◽  
Boundary Phase ◽  
Analytical Electron ◽  
Analytical Electron Microscope ◽  
Series Of Experiments ◽  
Compositional Gradients ◽  
Mobile Liquid

Magnesia partially stabilised zirconia (Mg-PSZ) ceramics are renowned for their excellent nechanical properties. These are effected by processing conditions and purity of starting materials. It has been previously shown that small additions of strontia (SrO) have the effect of removing the major contaminant, silica (SiO2).The mechanism by which this occurs is not fully understood but the strontia appears to form a very mobile liquid phase at the grain boundaries. As the sintering reaches the final stages the liquid phase is expelled to the surface of the ceramic. A series of experiments, to examine the behaviour of the liquid grain boundary phase, were designed to produce compositional gradients across the ceramic bodies. To achieve this, changes in both silica content and furnace atmosphere were implemented. Analytical electron microscope techniques were used to monitor the form and composition of the phases developed. This paper describes the results of our investigation and the presentation will discuss the work with reference to liquid phase sintering of ceramics in general.

The Upper Atmosphere Composition Spectrometer.

1986 ◽  
Author(s):  
David C. Kayser ◽  
William T. Chater ◽  
Charles K. Howey ◽  
James B. Pranke
Keyword(s):  
Upper Atmosphere ◽  
Atmosphere Composition

EFFECTS OF ATMOSPHERE COMPOSITION ON POSTHARVEST QUALITY OF FRESH BASIL LEAVES (OCIMUM BASILICUM L.)

2005 ◽  
pp. 731-736 ◽  
Author(s):  
M.L. Amodio ◽  
G. Peri ◽  
G. Colelli ◽  
D. Centonze ◽  
M. Quinto
Keyword(s):  
Ocimum Basilicum ◽  
Postharvest Quality ◽  
Atmosphere Composition

Impact of the atmosphere composition in the process of synthesis on the morphology and electrochemical performance of Pt/C electrocatalysts

2017 ◽  
Vol 21 (10) ◽  
pp. 2899-2907 ◽  
Author(s):  
Anastasia A. Alekseenko ◽  
Vladimir E. Guterman ◽  
Natalia Yu Tabachkova ◽  
Olga I. Safronenko
Keyword(s):  
Electrochemical Performance ◽  
Atmosphere Composition

Heat Treatment Process and Parameter Design in Manufacturing

2000 ◽  
Author(s):  
Ramana V. Grandhi ◽  
Zhichao Li
Keyword(s):  
Heat Treatment ◽  
Volume Fraction ◽  
Surface Hardness ◽  
Surface Method ◽  
Design Variables ◽  
Element Simulation ◽  
Gas Carburizing ◽  
Quenchant Temperature ◽  
The Heat Transfer Coefficient ◽  
Material Temperature

Abstract The heat treatment operation which is carried out post manufacturing is optimized. Simulation of the carburizing and quenching processes with parameter optimization are combined to attain the desired surface hardness with controlled distortion of final products. Parameters of interest for optimization include, the carbon content of gas, carburizing dwell time, material temperature before quenching, quenchant temperature and the heat transfer coefficient. The response surface method is used to obtain closed-form models of the objective (surface hardness) and the two constraints (hardness variance and physical distortion) in terms of the design variables. A finite element simulation tool is used to predict the material response (volume fraction of different phases, temperature and stress/strain) during the carburizing and quenching processes. This paper summarizes the methodology that is used to optimize the carburizing and quenching processes of an axisymmetric disk.

Titan's upper atmosphere: Composition and temperature from the EUV solar occultation results

1982 ◽  
Vol 87 (A3) ◽  
pp. 1351-1359 ◽  
Author(s):  
Gerald R. Smith ◽  
Darrell F. Strobel ◽  
A. L. Broadfoot ◽  
B. R. Sandel ◽  
D. E. Shemansky ◽  
...  
Keyword(s):  
Upper Atmosphere ◽  
Solar Occultation ◽  
Atmosphere Composition

scholarly journals Application of Gas-Chromatography to the Furnace Atmosphere Gases.

1965 ◽  
Vol 51 (2) ◽  
pp. 226-231
Author(s):  
Akira ADACHI ◽  
Nobuya IWAMOTO ◽  
Isao MIYAWAKI
Keyword(s):  
Gas Chromatography ◽  
Furnace Atmosphere
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