Systems Design, Fabrication, and Testing of a High-Speed Miniature Motor for Cryogenic Cooler

Table 1

Properties of materials considered for the rotorshaft/magnet assembly.

Properties	Magnet SmCo	Titanium Ti-6Al-4V	Inconel 718SPF	MP35N
Yield Strength MPa	830 (in Compression)	1400	1390	1620
Density kg/m^3	8500	4420	8220	8430
CTE m/m. ^∘C	7×10^−6	9×10^−6	14×10^−6	12.8×10^−6