6.3 Test facilities
Regarding the test facilities, an electronic balance (Type JJ1000Y) was used for testing the mass of sample (accuracy 0.01g). A leeb hardness tester (Type TH-120A(D)) was applied for testing the surface strength of sample. A supersonic reflectoscope (Type RSM-SY5N) was utilized for testing the P-wave velocity of sample, a full set of touch-based sampling analysis software that can preset the lead time and find the initial value automatically. Portable micrograph (Type 3R-WMMOTV) was used for the surface micrograph of sample (resolution of 960*240). Refrigerating machine (Type DW-40) was adopted for freezing the sample (with a volume of 80L and a minimum temperature of -40℃). A dry oven (Type 101-3SB) was applied for thawing the sample (the maximum heating temperature can reach 300℃). A low vacuum scanning electron microscope (Type JSM-5600LV) was used for analyzing the microstructure of sample (HV resolution of 3.5nm, and LV resolution of 5.0nm.). A X-ray powder diffractometer (Type D/Max-TTRⅢ) was utilized for analyzing the mineral and chemical composition of the sample, sharp shadow high temperature in situ material structure analysis system and Galipixcel 2d and Xe proportional detector.