| 摘要 |
Process for joining parts made of ceramic materials. A process for joining parts or components of ceramic material based on the smoothing of joints between particles which comprises the following steps: after treatment of the surfaces to be joined, comprising polishing with diamond paste, the two surfaces are mated and a compression force is applied so that superplastic deformation of the material can take place at a temperature of not less than 1,300 degree C. Smoothing of the particle joints produces a perfect join in very fine ceramic materials (<= 1 μ, in general terms). The main advantages of this process are: 1) working with lower temperatures and shorter periods than in the diffusion joining process, and 2) the absence of need for an interphase of other materials, e.g. intermediate layers of metal, so that the joined parts form a whole without discontinuity at microstructural level. Applicable in any industrial process which requires the firm bonding of fine-grained ceramic parts.
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