Motion and heating of powder during thermal spray-deposition of coatings

Conclusions Because of the nonisothermality of the plasma stream, the most intense acceleration and heating of particles occur in its initial portion. In the main portion the acceleration and heating are less intense. The relationships derived make it possible to estimate the temperature and velocity of particles at any point within the spray-deposition range. The results yielded by a calculation of the temperature and velocity of tungsten particles in argon are in accord with experimental data.Translated from Poroshkovaya Metallurgiya, No. 7(271), pp. 67–72, July, 1985.     

A theoretical and experimental study of hydrides in zirconium alloys

A method developed for computing the critical length and thickness of hydride plates formed in delayed hydride cracking (DHC) in zirconium alloys is considered. The model is based on analyzing the distribution of tensile stresses in the plane of a sharp normal tensile crack. The characteristics of hydrides formed due to DHC in reactor tubes produced from alloy Zr-2.5% Nb are determined experimentally. The results of the computation agree well with experimental data. __________ Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 5–9, April, 2006.     

A computational-experimental investigation of the temperature field of IGR masonry

The experimental measurements of the temperature in IGR reactor masonry are analyzed, and it is shown that because of the radiation heating of the thermocouples, it is impossible to measure the temperature at the moment of a run and because of the time constant of the measuring system, it is impossible to measure the temperature during a period of 1 min after a run. The three-dimensional code TEMPO was developed to calculate the temperature field of the reactor masonry. It is shown that the code predicts the temperature field to within 10%, which is adequate for the present stage of the work. Computational results for the temperature field of the masonry are presented, 6 figures, 6 references. Translated from Atomnaya énergiya, Vol. 88, No. 4, pp. 247–251, April 2000. Original article submitted March 13, 2000.