SU1555647A1 - Method of monitoring spreading of molten metals - Google Patents

Abstract

The invention relates to the determination of the physicochemical properties of materials and can be used in the treatment of metallized dielectrics with melts and the application of liquid phase coatings. The aim of the invention is to determine the conditions of maximum spreadability of liquid metals on the surface of thin films. For this pre-on refractory plate through apertures in a mask in the form of evaporation and condensation mesh applied system projections of a material of the plating film, the liquid metal is applied in the form of drops of N ₀ and the thickness of the wicking time dependences determined maximum condition spreadability. 1 il.

Description

The invention relates to methods for determining the physicochemical properties of materials and can be used in the treatment of metallized surfaces of dielectrics with melts, the application of liquid-phase coatings and in other scientific and technical experiments using thin-film systems in plenary technology, film electronics, etc.

The aim of the invention is to determine the conditions of maximum spreadability.

The drawing is a diagram of the implementation of the proposed method.

The drawing shows a refractory substrate 1, islands (projections) deposited on it of solid metal 2 with a thickness d, covering them with a continuous film 3 of the same metal with a thickness and drops of liquid metal 4 with a thickness h “,.

The method is implemented as follows.

A system of islands having a height d and occupying an area of Sf is applied onto a refractory substrate through a mask. A layer of the same metal with a thickness and area S is deposited onto an island-covered substrate. Examine the extensibility depending on the thicknesses he, / i, d and also OTo (Sf / S and determine the conditions of maximum spreadability.

Example. On the surface of the glass, silver islands with a height d varying in the fractions of 0.07–0.2 µm were deposited on the surface of the glass through meshes with openings having dimensions of, µm. Next on the substrate

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Claims (1)

The claims are that, in order to determine the conditions of maximum flowability, a system of protrusions of a metallizing film material is applied to the refractory plate through holes in the mask in the form of a net by evaporation and condensation, and the liquid metal is applied in the form of a drop of thickness h ₀ , which is connected with a thickness of metallizing solid film 2 ^{and the} height of the protrusions d ratio: Rtv PpacnC dec + <1 + d x RsPdL sl / G rns I. where Rz RSPL Rasp With forces the density of the solid metal; density of liquid metal, 'density of the resulting alloy; the density of the forming melt; alloy concentration} A method for controlling the spreadability of liquid metals, which consists in applying a metallizing film to the refractory plate by evaporation and condensation, which is then applied to a liquid metal, and determining the spreading rate from the time dependence 55 of the movement of the boundary of the liquid metal on a solid surface, excellent ^C P = _acrT is the concentration of the formed melt *, _S ₍ / S, where S | is the area occupied by the protrusions; S is the area of the metallizing film, and the condition of maximum spreadability is determined from the spreading time dependences.