DEFORMATIONS INSIDE BURNING SPECIMENS

The dynamics of particle motion inside burning specimens producing sol id combustion products was studied by flash radiography. In the experi ments, we used specimens of a Ti + C + 20% TiC mixture, inside which m arks in the form of strips of a of Zr + WO3 mixture or a tantalum powd er were placed. The specimens were burnt in a semiclosed rigid casing with exhaust of impurity gases through slags. It is established that, just behind the combustion front, particles of combustion products beg in to move in the direction opposite to the direction of motion. of th e combustion front. In the central zone of specimens, the particle vel ocity reaches values comparable with the combustion velocity of the sp ecimens (similar to 20 mm/sec), whereas, on the periphery, the particl e velocity is close to zero.