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Small Particle Melting of Pure Metals by G.L. Allen; R.A. Bayles; W.W. Gile; W.A. Jesser is a Engineering article available to read on EtoBox.

What is Small Particle Melting of Pure Metals about?

Submicron-sized crystallites of lead, tin, indium and bismuth were melted in situ in the modified specimen chamber of a Siemens transmission electron microscope. Melting point and size determinations were made directly from the dark field images of the crystallites. Particles exhibited melting points that decreased with decreasing particle size. A near-linear relationship was observed for the melting point as a function of the reciprocal of the radius. Thermodynamic expressions based on the significant contributions of the surface energy to the free energy of the system also suggest a linear relation. Other factors, such as shape and surface contamination, were also observed to affect the size-dependent melting of particles. Crystallites of extended platelet shape did not exhibit a significant depression in melting point. Elevated residual gas pressures were found to lessen the melting point depression of spherical particles.

Who reads Small Particle Melting of Pure Metals?

Author

G.L. Allen; R.A. Bayles; W.W. Gile; W.A. Jesser

Published

1986

Language

EN

Field

Engineering (Physical Sciences)