Premium
A SIMPLE EXPANSIBILITY TEST FOR DETERMINING THE WELDING PROPERTIES OF GLASSES 1
Author(s) -
Sharp Donald E.
Publication year - 1921
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1921.tb17335.x
Subject(s) - welding , materials science , thread (computing) , rod , softening point , flat glass , curvature , composite material , softening , mineralogy , geology , geometry , mathematics , mechanical engineering , engineering , medicine , alternative medicine , pathology
Simple method of determining the relative expansibilities of two glasses.—Place two rods of glass side by side with the ends flush, heat these ends, weld together by pinching with forceps and then pull out a thread or thin strip with the two glasses forming opposite sides. When cool the thread will bend toward the glass having the higher total expansion up to the softening point of the softer glass. This test may be used for quantitative determination of coefficieots of expansion if a series of glasses of known expansibilities are available for comparison. The method is of particular value for investigating the welding properties of glasses , for whether or not two glasses can safely be welded together may be determined directly from the amount of curvature of the thread.