Bonding process penetration

Deep Bonding Process (Tiefbonder-Verfahren, in Ger) for AP Projectiles. This method, developed in Germany during WWII by the late Dr. V. Duffek collaborators, consists of deep surface treatment of a sintered iron AP projectile with a phosphate. The method is claimed to diminish the wear of gun barrels and to increase the effectiveness of armor penetration by AP projs... 

The most critical component is the artifact interface. The initial bonding process or penetration of the disintegrated fabric is selected relative to the characteristics of the degraded field. The following categories are presented with suggestions for the type of consolidant that might be used. 

Low-molar-mass poly(butadiene) oils with 80%-97% cw-1,4 contents are produced with other Ziegler catalysts (for example, cobalt compounds with alkyl aluminum chlorides or nickel compounds with trialkyl aluminum and boron trifluoride-etherate). The products have few cross-links and dry as fast as wood oil and faster than linseed oil. Conversion of the poly (butadiene) oils with 20% maleic anhydride gives air-drying (air-hardening) alkyd resins. Modified poly (butadiene) oils stabilize erosion-endangered soils. Because of its low viscosity, the aqueous emulsion penetrates the surface soil layers. The surface crust is reinforced by an oxidative bonding process. Since no skin is formed on the soil crust, the aqueous absorption characteristics of the soil are retained. 

The application of adhesives can also be assisted by various other means. For instance, it is possible to use spaces with a predefined depth to dose exactly the amount of glue required. An adhesive with a low viscosity will penetrate these spaces under capillary action. This technique is called capillary space adhesive technique and is very often used in the microtechnique for example to join microvalve systems by adhesive bonding [341]. The fabrication of a micropump and the optimisation of microstructures for the adhesive bonding process are described in the literature [339,340]. 

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