For the inspection of graphitized blanks and mechanically processed products:
(1) The inspection of machining quality is mainly the inspection of dimensional accuracy and surface roughness.
(2) Detection of chemical composition analysis, composition and element analysis, analysis of sulfur, phosphorus, barium, nickel, titanium and other trace elements according to different products.
(3) Measurement of general physical properties, including measurement of bulk density, true density, porosity, pore distribution and pore size distribution.
(4) The detection of structure analysis mainly includes metallurgical microscope, X-ray diffraction and electron microscope, and determination of graphitization degree.
(5) Measurement of mechanical properties, including compression, bending, tensile, elastic modulus and hardness. In addition, the coefficient of friction and the amount of wear are measured.
(6) Electromagnetic performance testing mainly includes the measurement of resistivity, susceptibility, Hall coefficient, magnetoresistance, etc.
(7) Thermal performance testing, mainly including heat capacity, thermal conductivity, linear expansion coefficient, oxidation degree, thermal creep, thermal shock, etc.
(8) Nuclear radiation performance testing, which includes neutron capture cross-sectional area and nuclear radiation damage testing.
In addition, there are chemical reactivity testing, brush braid pull-out force testing and other testing according to different products.
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