Experimental and Numerical Investigations of Titanium Deposition for Cold Spray Additive Manufacturing as a Function of Standoff Distance.

In this research, the cold spray process as an additive manufacturing method was applied to deposit thick titanium coatings onto 7075 aluminium alloy. An analysis of changes in the microstructure and mechanical properties of the coatings depending on the standoff distance was carried out to obtain the maximum deposition efficiency. The process parameters were selected in such a way as to ensure the spraying of irregular titanium powder at the highest velocity and temperature and changing the standoff distance from 20 to 100 mm.

[Cases of granular cell tumor (myoblastoma) in the larynx].

Two patients suffering from very rare granular cell tumor of the larynx were observed at the ENT Department of Medical School in Szczecin in the period 1986 to 1990. In one case the tumor located in the intra-arythenoid region was treated by tyreotomy. In the second case the tumor contained comisura anterior and cricothyreoidea region and was resected by subglottic laryngectomy.