Inconel　718　is　a　popular　precipitation-hardened,　corrosion-resistant　nickel　superalloy　that　is　widely　used　in　aerospace　turbines,　liquid　fueled　rockets,　and　other　high　temperature　applications.　To　better　match　the　high　temperature　stability　of　Inconel　718,　a　MnCoCrNiFe　high　entropy　alloy　(HEA)　bulk　material　and　nanoparticle　paste　(nanopaste)　were　developed.　Two　brazing　techniques　were　investigated　for　this　brazing　material:　laser　brazing　and　vacuum　brazing.　Laser　brazing　produces　a　small　heat　affected　zone　and　very　short　brazing　time.　For　vacuum　brazing,　transient　liquid　phase　bonding　is　employed　for　brazing　Inconel　718　to　exploit　a　lower　processing　temperature　by　heating　above　the　solidus　line　of　HEA　in　conjunction　with　the　size-dependent　melting　point　depression　behavior　of　nanoparticles.　The　mechanical　properties　and　microstructural　evolution　of　the　brazed　joints　were　determined　to　build　a　fundamental　understanding　of　HEA　brazing　filler　metals　and　the　difference　in　behavior　of　the　bulk　brazing　filler　metals　and　the　brazing　nanopaste.　©　Copyright　2017　MS&T17.