.~.~> With diffusion of atoms or nuclear particles
DEFINITION
Classification: 228/196
(under subclass 101) Process in which one self-sustaining work part is joined to another at their meeting faces by locally heating at least a portion of the meeting faces to the fusion point of at least one of the work parts, the fused material joining the parts being derived solely from the parts.
(1) Note. The joining of two or more parts by use of a filler material of the same constituency as the work parts is sometimes designated as an "autogenous" joint but is not so considered for this subclass.
(2) Note. Only minor melting of the work parts is found in this subclass so that the work parts substantially retain their original configuration. Formation of a substantial pool of liquid at the meeting faces of the work parts will be found elsewhere.
SEE OR SEARCH THIS CLASS, SUBCLASS:
254, for joining of "pre-tinned" or filler coated parts either with or without the application of additional filler material.
SEE OR SEARCH CLASS
219, Electric Heating, 117+, for a process of bonding with pressure by the use of electrically generated heat, and subclasses 137 and 148 for a similar process not utilizing pressure.
