Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Additive manufactured isotropic NdFeB magnets by stereolithography,
  fused filament fabrication, and selective laser sintering   Magnetic isotropic NdFeB powder is processed by the following additive
manufacturing methods: (i) stereolithography (SLA), (ii) fused filament
fabrication (FFF), and (iii) selective laser sintering (SLS). For the first
time, a stereolithography based method is used to 3D print hard magnetic
materials. FFF and SLA use a polymer matrix material as binder, SLS sinters the
powder directly. All methods use the same hard magnetic NdFeB powder material.
Complex magnets with small feature sizes in a superior surface quality can be
printed with SLA. The magnetic properties for the processed samples are
investigated and compared. SLA can print magnets with a remanence of 388 mT and
a coercivity of 0.923 T. A complex magnetic design for speed wheel sensing
applications is presented and printed with all methods.

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The categories of this paper are: math
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
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The categories of this paper are: econ
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio