| 摘要 |
New self-lubricating dense articles. They are characterised in that they consist essentially of sintered rare-earth fluorides, that they exhibit a density at least equal to 90% of the theoretical density of the rare-earth fluoride in question and that they exhibit a fine-grained uniform microstructure. They are obtained by a process consisting in sintering, in a nonoxidising and/or reducing atmosphere, a submicron and very pure powder of rare-earth fluorides in the presence of a carbonaceous sintering additive. These articles can be employed as self-supporting components or as insert components.
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