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To Al-TiO 2 -B 2 O 3 reaction system , made ??by mechanical milling ultra-fine powder , mixed with a certain proportion dihydrogen phosphate, aluminum adhesive coated on the surface of Q235 steel thermal curing , through the powder particles between the solid phase reaction at 700 ℃ situ synthesized Al the 2 O 3 < / sub > - of TiB 2 composite ceramic coating . Al-TiO 2 -B 2 O 3 composite powder equipment and means of SEM , laser particle size distribution analyzer , XRD, DTA study mechano-chemical and thermo-chemical characteristics of the morphology , particle size distribution , phase composition , grain size changes ; using thermodynamics , dynamics method to study the formation mechanism of the coating and the bonding strength of the coating , wear resistance and other mechanical properties of the test . The results showed that the chemical action of mechanical force makes the Al - TiO the 2 -B 2 O 3 < / sub > system thermochemical reaction at 670 ℃ can occur , thus , at 700 ° C coatings prepared , its physical phase composition is Al 2 O 3 < / sub > , TiB 2 and containing a small amount of unreacted of Al, TiO 2 and accessories reaction Cr 2 O 3 and MgAl of 2 O 4 < / sub> . When the coating aggregate Al, TiO 2 , B2O 3 molar ratio of 10:3:3 , aggregate and binder mass ratio of 1.5 : 1:00 , coating performance the best combination of strength up to 13.4MP, up to 45 times the number of thermal shock ; basement wear resistance is increased 3.21 times .
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