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Chemically modified single-crystal

Kinetics Over Chemically Modified Single Crystal Surfaces... [Pg.190]

Simulations for Ni-based superalloys have been carried out by Saunders (1995, 1996b), Chen et al. (1994) and Boettinger et al. (1995). Saunders (1995) used a straightforward Scheil simulation to predict chemical partitioning and the formation of interdendritic phases in a modified single crystal U720 alloy containing... [Pg.463]

The above described experiments over atomically clean single crystal catalysts have been extended to studies of the kinetics of various catalytic reactions over chemically modified catalysts. Examples are recent studies Into the nature of poisoning by sulfur of the catalytic activity of nickel, ruthenium, and rhodium toward methana-tlon of CO (11,12) and CO2 (15). ethane (12) and cyclopropane (20) hydrogenolysls, and ethylene hydrogenation (21). [Pg.190]

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