ISSN:
1573-4889
Keywords:
Pack cementation
;
aluminide diffusion coatings
;
metal halide vapors
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract An atmospheric pressure sampling mass spectrometer was used to identify the vapor species generated in a halide-activated, cementation pack. Pack powder mixtures containing a Cr-Al binary masteralloy powder, an NH4Cl activator salt, and either ZrO2 or Y2O3 (or neither) were analyzed at 1000°C. Both equilibrium calculations for the pack and mass spectrometer results indicated that volatile AlClx and CrCly species were generated by the pack powder mixture; in packs containing the reactive element oxide, volatile ZrClz and YClw species were formed by the conversion of their oxide sources.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00665043
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