Low oxygen molybdenum-titanium-zirconium (TZM) alloys were prepared by powder metallurgy with fructose as carbon source. Two sintering methods (hydrogen sintering and vacuum sintering) were used to test the oxygen content and carbon content of TZM alloys with different carbon content. The relative density of TZM alloy sintered sample was measured by a simple density measuring instrument with drainage method. Before measuring the micro Vickers hardness of the sample, metallographic corrosion treatment was required for the sample. After wire cutting, the sample surface was polished by sandpaper 180#-3000# and then polished with 1.5 μm diamond polishing agent to completely eliminate scratches. Murakami etch solution was used for wipe etching using potassium ferricyanide, sodium hydroxide and water (1:1:10). Microhardness test is the use of Wolpert 401MVD digital Vickers hardness tester, the hardness tester is a semi-automatic instrument, the test process requires manual control of the tester. The indenter for Vickers hardness is a square conical diamond with an Angle of 136° on opposite surfaces. The test load is 200 g and the pressure holding time is 10 s. The grain size of the sample was measured by SEM microstructure. The thermodynamics of TZM alloy sintering process was calculated by HSC Chemistry. In order to analyze the actual chemical reaction process of TZM alloy sintering, TZM alloy powder was analyzed by thermogravimetric mass spectrometry. The model of the THERMOgravimetric mass spectrometry analyzer was Perkinelmer TL2000. The test temperature was 25℃~ 1000℃, and the heating rate was 20 ℃/min. The test environment was argon atmosphere, and the detected gases were H2, H2O, CO and CO2.
