Commissariat a L'energie Atomique

Thierry Lieven

Marcel Boncoeur

Bernard Hansz

Marc Palacio

The invention relates to a process for shaping a material by isostatic compression at a temperature of at least 1300.degree. C. of a powder of said material in a tight sheath. The sheath is made from titanium or a titanium alloy and is internally coated with tantalum in such a way that the sheath can be embrittled during hot isostatic compression, by the diffusion of tantalum into the titanium or titanium alloy, in the presence of oxygen. In general, the titanium sheath is coated with tantalum by spraying in the presence of oxygen. The use of such a sheath makes it possible to avoid the operation of eliminating the sheath chemically or mechanically conventionally necessary in such processes.

Process for shaping a material by hot isostatic pressing and titanium

The invention relates to a process for the production of porous products of boron or boron compounds. This process comprises the following stages:

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Montrouge, France

Thierry Lieven