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Abstract
A review of published work on the use of porous materials for externally pressurized gas-bearing restrictors is presented, together with an explanation of the properties of the porous restrictor relative to orifice and capillary restrictors.
Areas in which further work on porous materials is required are stated and a material considered suitable for gas-bearing applications is defined.
Notes
* Manuscript received 9 June 1969. Contribution to a Symposium on “Lubrication, Friction, and Wear (Tribology) in Powder Metallurgy” to be held in Eastbourne on 24-26 November 1969.