Well-densified Ni3Al alloys with and without boron addition were fabricated by self-propagation high-temperature synthesis and hot extrusion technology. Microstructure investigation showed that Ni3Al and Ni3Al-1B alloys contained fine grain structure. Analysis of X-ray spectra as well as transmission electron microscopy studies revealed that three phases present in all alloys: γ-Ni, Ni3Al and dispersoids of α-Al2O3 and γ-Al2O3. However, β-NiAl, Ni3B phase and twinned Ni3Al crystal were observed in the Ni3Al-1B alloy. In addition, dislocations with high density existed in all of the alloys. The mechanical test showed that the B addition leads to obvious improvement in yield strength and compressive ductility, and compared with the ones synthesized by combustion, high-temperature synthesis and hot extrusion-synthesized Ni3Al and Ni3Al-1B alloys exhibited superior mechanical propertiesMicrostructure and Mechanical Properties of Ni3Al and Ni 3Al-1B Alloys Fabricated by SHS/HE. Guo, J.T., Sheng, L.Y., Xie, Y., Zhang, Z.X., Ovcharenko, V.E., Ye, H.Q.: Intermetallics, 2011, 19[2], 137-42