Snecma Moteurs

Snecma Propulsion Solide

Obschestvo S Ogranichennoi Otvetstvennostiju Nauchno-proizvodstvenny Tsentr &ldquo;uglerodnye Volokna I Kompozity&rdquo;

Mark Kazakov

Pierre Olry

Sylvie Loison

Marina Marakhovskaya

Vladislav Markovich Kernichansky

Alentin Trouchnicov

The subject of the present invention is a method of obtaining fibrous carbon materials by carbonization of cellulosic fibrous materials carried out continuously or batchwise in the presence of at least one organosilicon compound. Characteristically, said organosilicon compound is chosen from the family of cyclic, linear or branched polyhydrosiloxanes which are substituted with methyl and/or phenyl groups and the number-average molecular mass of which is between 250 and 10 000, advantageously between 2 500 and 5 000.

Carbonization of cellulosic fibrous materials in the presence of an organosilicon compound

The carbonization of cellulose fiber fabric comprises an initial stage of heat treatment up to 250&#xb0; C. to 350&#xb0; C., with a relatively high mean temperature rise speed of 10&#xb0; C./min to 60&#xb0; C./min, an intermediate stage up to 350&#xb0; C. to 500&#xb0; C. with a lower mean temperature rise speed of 2&#xb0; C./min to 10&#xb0; C./min, and a final stage up to 500&#xb0; C. to 750&#xb0; C. with a mean temperature rise speed that is again raised to 5&#xb0; C./min to 40&#xb0; C./min.

Method of obtaining a carbon fiber fabric by continuously carbonizing a cellulose fiber fabric

The inventive apparatus for transosseous osteosynthesis comprises a detachable repositioning mechanism for axial compression and distraction of bone fragments, the mechanism having a thrust element with two guiding bars. A mobile traverse is mounted on the guiding bars. A lead screw which interacts with a screw orifice of the mobile traverse is fixed in the thrust element. Two side bars for movement of bracing frames, one end of each of the side bars being fixed to the mobile traverse, the other end being fixed to a holder with the aid of a screw clamp. The apparatus has at least two holders, each comprising a hollow body with an inner cylindrical surface, the axis of the body coincides with the axis of a corresponding tightening bolt, and also has a stem on the side surface of the body with an opening, which stem has a threaded portion. A latch is disposed in the holder body and is intended for fixing the holder in the direction of axial movement along the tightening bolt. According to another embodiment, the apparatus comprises an assembly for drawing in and fixing the bone fragments, which assembly is disposed between the strips having longitudinal slots.

Apparatus for transosseous osteosynthesis

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Moscow, Russia

Mark Kazakov