Performance Study On Laser Induction Self-propagating Sintering Synthesis Of Ni-Al System

Ni-Al alloy was produced by Laser Induction Self-propagating Sintering Synthesis.The morphology of microstructure of Ni-Al alloy that synthesized through differentatomic percentage、milling time and laser power were observed with X-Ray Diffraction（XRD）、Scanning Electron Microscope （SEM）. Afterwards, The measurement ofdensity、hardness and abrasion resistance were conducted. The results showed that:1) NiAl was the main phases, with few phases such asγ-Ni、Al₂O₃observedwhen atomic percentage was Ni-34Al. Its density and hardness value with laser powderand milling time increase. Porosity degree and wear resistance with laser powder millingtime increase and decreases. When milling time was10h and laser powder was1000W，Rockwell hardness increased by61HRC. Wearing capacity was4.82×10-4g/mm2.2) Ni₃Al was the main phases, with few phases such asγ-Ni、Al₂O₃observedwhen atomic percentage was Ni-28Al. Its density and hardness value with laser powderand milling time increase. Porosity degree and wear resistance with laser powder millingtime increase and decreases. When milling time was10h and laser powder was1000W，Rockwell hardness increased by60HRC. Wearing capacity was4.91×10-4g/mm2.3)Ni₃Al was the main phases, with few phases such asγ-Ni、Al₂O₃observedwhen atomic percentage was Ni-25Al. Its density and hardness value with laser powderand milling time increase. Porosity degree and wear resistance with laser powder millingtime increase and decreases. When milling time was10h and laser powder was1000W，Rockwell hardness increased by66HRC. Wearing capacity was4.33×10-4g/mm2.