The Influence of Green Density upon Sintering

1984 ◽  
pp. 89-102 ◽  
Author(s):  
M. A. Occhionero ◽  
J. W. Halloran
Keyword(s):  
Green Density

A Fast Synthesis and Sintering of Mg2Si1−xSnx (0≤x≤1.0) Solid Solutions by Microwave Irradiation

2011 ◽  
Vol 197-198 ◽  
pp. 417-420 ◽  
Author(s):  
Shu Cai Zhou ◽  
Chen Guang Bai ◽  
Chun Lin Fu
Keyword(s):  
Microwave Irradiation ◽  
Solid Solutions ◽  
Microwave Assisted Synthesis ◽  
Green Density ◽  
X Ray Diffraction ◽  
Power Setting ◽  
Xrd Patterns ◽  
Heating Behavior ◽  
Fast Synthesis ◽  
Lower Heating

In order to reduce the oxidizing and volatilizing caused by Mg element in the traditional methods for synthesizing Mg2Sil-xSnxsolid solutions, Mg2Sil-xSnxsolid solutions have been prepared by Microwave-assisted Synthesis techniques. The heating behavior of Mg, Si and Sn fixed powder was investigated under microwave irradiation. X-ray diffraction (XRD) was used to characterize the powders. The results suggest that the temperature-rising rate is also dependent on the initial green density and higher green density provides lower heating rate while power setting are fixed. XRD patterns show that Mg2Sil-xSnxsolid solutions have been well formed under microwave irradiation.

Influence of powder characteristics on the properties of green compacts of Bi-2212 powders

1997 ◽  
Vol 12 (1) ◽  
pp. 21-27 ◽  
Author(s):  
D.-W. Yuan ◽  
M. D. Aesoph ◽  
J. Kajuch
Keyword(s):  
High Temperature ◽  
Confining Pressure ◽  
Plastic Behavior ◽  
Particle Sizes ◽  
Green Density ◽  
High Temperature Superconducting ◽  
Powder Characteristics ◽  
The Relationship ◽  
Powder In Tube ◽  
Superconducting Applications

With the growing potential for use of Bi-2212 powders in high temperature superconducting applications, it is important to understand the processing characteristics of the material. To meet this need, the present work established the relationship between confining pressure and green density for powders of different particle sizes and morphologies. Mechanical properties, including elastic and plastic behavior, of the resulting green compacts were also measured as a function of relative density. Particle size and size distribution are shown to have a significant impact on the properties of interest. The implications of such findings are discussed with respect to the powder-in-tube process for making high temperature superconducting wire and tape.

Selective Laser Sintering of Zirconia

2000 ◽  
Vol 625 ◽  
Author(s):  
Nicole R. Harlan ◽  
David Bourell ◽  
Seok-Min Park ◽  
Joseph J. Beaman
Keyword(s):  
Selective Laser Sintering ◽  
Base Material ◽  
Laser Sintering ◽  
Average Density ◽  
Mold Material ◽  
Material System ◽  
Green Density ◽  
Stabilized Zirconia ◽  
Ceramic Components ◽  
Shock Resistance

AbstractA combination of Selective Laser Sintering and colloidal infiltration has been used to create partially stabilized zirconia molds for titanium casting. The mold material system was chosen for its low reactivity with molten titanium and thermal shock resistance. The base material, stabilized zirconia mixed with a copolymer binder, was pre-processed before laser sintering into the desired green shape. The average density of the fired parts could be increased to twice that of the green density. Hole sizes as small as 180 m are possible in thin ceramic components.

Effects of Green Density on Crystallization and Mullitization in the Transiently Sintered Mullite

1992 ◽  
Vol 75 (12) ◽  
pp. 3457-3461 ◽  
Author(s):  
Jia G. Wang ◽  
Clive B. Ponton ◽  
Peter M. Marquis
Keyword(s):  
Green Density

Dense, bubble-free ceramic deposits from aqueous suspensions by electrophoretic deposition

2001 ◽  
Vol 16 (2) ◽  
pp. 321-324 ◽  
Author(s):  
Tetsuo Uchikoshi ◽  
Kiyoshi Ozawa ◽  
Benjamin D. Hatton ◽  
Yoshio Sakka
Keyword(s):  
Electrophoretic Deposition ◽  
Current Density ◽  
Bubble Formation ◽  
Slip Casting ◽  
Green Density ◽  
Laminate Composites ◽  
Aqueous Suspensions ◽  
Sintering Properties ◽  
Current Densities ◽  
Positively Charged

The characteristics of electrophoretic deposition (EPD) of positively charged particles onto a cathode were investigated using aqueous alumina and zirconia suspensions. The deposition was performed using several kinds of metal substrates at different current densities. For most substrate materials, a large number of macropores appeared in the deposit, and their size increased with the current density due to gas bubble formation. However, no macropores were formed in the deposit on a palladium substrate, regardless of the current density. The green density and sintering properties of the EPD deposits on a palladium substrate from aqueous suspensions were the same as from slip casting. Bubble-free zirconia/alumina laminate composites were also fabricated by EPD from aqueous suspensions.

Warm Compacting Behaviors and Sintering Performance of 316L Stainless Steel Powder

2012 ◽  
Vol 538-541 ◽  
pp. 1088-1091
Author(s):  
Mei Yuan Ke
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
316L Stainless Steel ◽  
Sintered Density ◽  
Steel Powder ◽  
Nitrogen Atmosphere ◽  
Green Density ◽  
Cold Compaction ◽  
Warm Compaction ◽  
Made In

Warm compacting behavior and sintering performance of 316L stainless steel powders were studied. Results showed that green density and strength of samples made in warm compaction were much higher than that in cold compaction. Under pressure of 700MPa, green density and strength in warm compaction were 7.01 g•cm-3and 30.7MPa, which were higher than cold compaction by 0.19 g•cm-3and 10.7MPa. When sintered in hydrogen-nitrogen atmosphere for 60 minutes, sintered density, tensile strength and elongation all increased with the rise of sintering temperature. At 1300°C, Sintered density, tensile strength and elongation were 7.42 g•cm-3, 545MPa, 28.0%, respectively.

Comparison of Different Alumina Powders for Aqueous Tape Casting Process

2015 ◽  
Vol 820 ◽  
pp. 172-177
Author(s):  
Fernanda P. Santos ◽  
Ediana Gambin ◽  
Cristina Moniz A. Lopes ◽  
Rosa Maria Rocha
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Tape Casting ◽  
Casting Process ◽  
Aqueous System ◽  
Solid Concentration ◽  
Green Density ◽  
Commercial Alumina ◽  
Acrylic Latex ◽  
Final Density

Tape casting process was used to produce Al2O3 substrates in an aqueous system with acrylic latex emulsion as binder. The present work studied the slurry formulations in aqueous medium of Al2O3 powders with different particle size distribution and made correlation to the green and sintered tapes. Two commercial alumina powders, one sub-micrometric and other micrometric were used. Compositions of Al2O3 slurries with 80 and 83 wt% of solids were prepared by dispersing the powders in water with a dispersant with subsequently additions of 7 and 10 wt% of binder. Sub-micrometric Al2O3 resulted in a high densification tapes regardless solid concentration and binder amount in the slurry, though green density was affected. For micrometric alumina, increasing the solid concentration resulted in a little higher final density.

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