Closure to “Discussion of ‘The Formation of Molybdenum Disilicide Coatings on Molybdenum’ [E. A. Beidler, C. F. Powell, I. E. Campbell, and L. F. Yntema (pp. 21–25)]”

Abstract

not Available.

Coatings of High-Temperature Materials

“…In the investigations described in [78,79], molybdenum wire was siliconized by the reduction of silicon tetrachloride by hydrogen on the surface ofthe molybdenum at temperatures of 1100-1800°C. An apparatus for carrying out this process is shown diagrammatically in Fig.…”

“…Experiments were made on the creation of silicide layers [78] on wire 2 mm in diameter; the silicon source was 99.80/0 SiCl 4 , which was reduced by carefully purified and dried hydrogen (hydrogen of 99.8%purity was passed over copper turnings heated to 400 -600°C, then dried with MgCI0 4 and pps and passed through magnesium turnings heated ta 600°C). The hydrogen was then passed through SiCl 4 and supplied to the coating chamber.…”

“…According to [78], the oxidation resistance of molybdenum silicide coatings on molybdenum wire may be expressed by the empiric al formula:…”