Vacuum hot pressing

Table 2. Commercial Grades of Vacuum Hot-Pressed Beryllium, Composition by wt...

The price of beryUium oxide powder was 154/kg in 1991. The beryUium content of copper-beryUium master aUoy was 352/kg. Pure beryUium powder was priced at 615/kg whereas simple shapes in vacuum hot-pressed material were priced at about 685/kg in 1991. 

The magnesium-reduced beryllium pebbles generally assay 96% beryllium and are always associated with residual magnesium and slag. These pebbles are purified to about 99.5% by vacuum induction melting in beryllia crucibles at temperatures of about 1400 °C. The ingots are machined and machined scarf is milled to produce beryllium powder. The ground metal powder is pressed and sintered under vacuum. The product is called vacuum hot-pressed beryllium, and this is machined for component manufacture. 

The sonication of 0.015M Fe(CO)s in decalin for 6h has also been shown to yield amorphous iron." Upon consolidation by vacuum hot pressing, the resulting iron was shown by XRD to be a-Fe, with an average particle size... 

Majima K, Niimi N, Watanabe M, Katsuyama S, Nagai H (1993) Effect of LiF addition on the preparation of transparent Y2O3 by vacuum hot-pressing method. J Jpn Inst Met 57 1221-1226... 

Figure 5.9 A comparison of the densification and microstructures of (a) vacuum hot pressed... 

Sample pieces were produced by cold pressing and sintering, as well as vacuum hot pressing techniques... 

In order to improve the comprehensive mechanical properties of Zr02 ceramic material, the influence of different particle size and contents of TiB2 and AI2Q3 powders on the microstructure and mechanical properties of Zr02 nano composite ceramic tool and die material is investigated. Zr02 nano composite ceramic tool and die material is prepared with Vacuum hot pressing technique at 1 450 °C for 60 min at 30 MPa. The results were shown in the Table 1. 

Lee PY, Kao MC, Lin CK, Huang JC, Mg-Y-Cu bulk metallic glass prepared by mechanical alloying and vacuum hot pressing , Intermetallics, 2006 14... 

When vacuum hot pressed in metal dies at higher pressures and lower temperatures this same spinel material has been densified to an essentially pore-free, fully transparent condition ( ). Figure 4 reproduces optical transmittance data from such an undoped MgAl204 disk 1 in. in diameter and 2.48 mm thick (after optical polishing). 

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