Recoat assemblies including powder containment mechanisms and additive manufacturing systems including same

An additive manufacturing system comprising:

• a recoat assembly comprising:
• a base member movable in a first lateral direction and a second lateral direction opposite the first lateral direction, the base member including a primary containment housing;
• a powder spreading member coupled to the base member, the powder spreading member at least partially encapsulated by the primary containment housing;
• and
• a containment mechanism including a first scraper assembly extending toward the powder spreading member, the first scraper assembly including a first scraper blade contacting the powder spreading member;
• and
• a build area positioned below the recoat assembly, the recoat assembly movable across the build area in the first lateral direction and the second lateral direction.

A method comprising:

• providing a recoat assembly comprising:
• a base member movable in a first lateral direction and a second lateral direction opposite the first lateral direction over a build area, the base member including a primary containment housing;
• a powder spreading member coupled to the base member, the powder spreading member at least partially encapsulated by the primary containment housing;
• and
• a containment mechanism including a first scraper assembly extending toward the powder spreading member, the first scraper assembly including a first scraper blade contacting the powder spreading member;
• and
• adjusting a position of at least a portion of the containment mechanism to contact the powder spreading member.