Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Functional Zr, {\alpha}-Ta, and ({\alpha}-\b{eta}) Ta thick coatings
  obtained by original arc-evaporator   Novel plasma-clustered deposition technique, called PVD Droplets, as well as
its main principles of operation were described. New types of obtained thick,
over 20 {\mu}m, functional coatings basing on Ta and Zr have been presented.
Results of research in physic-chemical properties of the coating materials are
listed including preliminary studies of superconductive properties. Comparative
evaluation between of obtained coatings and sample CVD coating was made.

28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci