Various　contents　of　nickel　coated　carbon　nanotube　added　sintered　silver　joints　are　fabricated　through　mechanical　alloying.　An　analytical　method　is　presented　to　compute　the　fracture　energy　of　ENF　tests　incorporating　shearing　effect　and　thickness　effect,　which　shows　better　accuracy　compared　with　traditional　method,　which　are　closer　to　the　solutions　of　compliance　based　beam　method.　Mode　II　fracture　energy,　mode　II　fracture　toughness　and　mode　II　cohesive　zone　model　for　different　contents　of　nickel　coated　carbon　nanotube　added　sintered　silver　joints　are　presented　based　on　the　data　extraction　of　the　ENF　tests.　With　the　increase　of　adhesive　layer　thickness,　the　fracture　energy　and　the　mode　II　fracture　toughness　improve.　However,　thickness　effect　is　less　significant　but　not　negligible　comparing　with　the　strengthening　effect　on　the　improvement　of　fracture　toughness,　which　is　caused　by　adding　nickel　coated　multiwall　carbon　nanotubes.　The　relation　between　mode　II　fracture　toughness　and　porosity　is　also　discussed.　For　most　of　the　conditions,　the　mode　II　fracture　toughness　is　higher　than　mode　I　fracture　toughness　regardless　of　additive　content　due　to　the　crack　deflection,　crack　bridging　and　pull-out　mechanisms　during　the　crack　propagation　except　for　those　high　content　of　additive　whose　fracture　energy　is　reduced　because　of　aggregation　effect.　©　2022　Elsevier　Ltd