Hygroscopicity filamentous

Gadolinium Oxide, Gd203, mw 362.52 wh to cream-colored powder, sp gr 7.407 at 15/4°, mp 2330° hygroscopic and absorbing C02 from the air in sol in w sol in acids except HF. Used in nuclear reactor control sods, neutron shields, catalysts, dielectric ceramics, filament coatings, special glasses and as P... 

Figure 14. Proposed structure and composition of hygroscopic elements within stratum corneum. A composite of three drawings filaments aggregate to form tonofibrils of 250-A diameter (14A), adapted from Ref. 70 lysed lipids and proteins form an 80-A coating (14B) around the tonofibrils, adapted from Refs. 47, 96, and 97. The depicted relationship of bimoaal protein and lipids to form hydrophilic surfaces (14C) is adapted from Ref. 98.

Resin material can affect fiber/resin delamination, one of the prerequisites for conductive anodic filament growth. Meashng occurs at about 260°C for FR-4, but may occur at lower temperatures for boards with more hygroscopic resins. 

Filiform corrosion results from the formation of a small hygroscopic disk having a relative humidity in equilibrium with the ambient atmosphere. This lentil is the active head of the filament s point where the cathodic reduction of water occurs Figure B.2.17 ... 

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