This　paper　aims　to　improve　the　magnetic　properties　of　sintered　Nd-Fe-B　magnet.　Ni　powders　were　added　to　the　Nd-Fe-B　magnet　through　intergranular　addition,　and　their　effects　on　the　microstructure　and　magnetic　properties　of　the　magnet　were　investigated.　By　adding　a　proper　amount　of　Ni　(0.3　wt%),　the　intrinsic　coercivity　H-cj　of　Nd-Fe-B　magnet　is　significantly　improved　with　only　a　slight　decrease　in　the　remanence　B-r　and　the　maximum　energy　product　(BH)(max).　The　microstructural　and　compositional　analyses　reveal　that　Ni　atoms　not　only　enter　the　matrix　phase　but　also　concentrate　in　the　intergranular　regions　either　as　Ni-containing　Nd-rich　phase　or　as　Ni　particles.　This　is　consistent　with　the　thermodynamic　calculation　results.　Furthermore,　a　sintering　mechanism　of　magnet　with　intergranular　addition　of　Ni　powders　is　tentatively　proposed.　These　results　may　provide　a　reference　for　improving　the　magnetic　properties　of　sintered　Nd-Fe-B　magnets.　(C)　2017　Published　by　Elsevier　B.V.