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FIG. 4. Oxide replica from specimen quenched from 540Β°C and aged 100 hr at 210Β°C. x 12,000.
precipitates shown in Fig. 4 which is an oxide replica taken from the alloy after ageing at 200Β°C. Again, the edge parts of helices must be the nucleating centres for preferential precipitation of 8' plates.
π SIMILAR VOLUMES
Optimum experimental conditions for the brittle fracture technique applied in trace metal analysis of biological material are described. The efficiency of the technique was tested by siave and radio-tracer experiments. Numerical results are presented for human placenta submitted to eight different g
A 70/30 brass wetted with mercury fails at about the engineering yield stress in a brittle manner. The degree of embrittlement is temperature dependent, showing an abrupt reversion to the fully ductile state in the manner of the transition displayed by body-centered cubic metals. The effective surfa
## Abstract ZnO single crystals were prepared by means of two methods:i slow cooling of ZnO/PbF~2~ (PbO) high temperature solution, (ii) flux reaction technique, hydrolysis of ZnF~2~ in PbF~2~ as a solvent. At cooling rate β₯ 0.9 K/h the known plates, hexagonal prisms, and hollow crystals were obtai
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