A printer fabricates an object from a computerized model using a fused filament fabrication process. A former extending from a nozzle of the printer supplements a layer fusion process by applying a normal force on new material as it is deposited to form the object. The former may use a variety of techniques such as heat and rolling to improve physical bonding between layers.

A printer fabricates an object from a computerized model using a fused filament fabrication process. The shape of an extrusion nozzle may be varied during extrusion to control, e.g., an amount of build material deposited, a shape of extrudate exiting the nozzle, a feature resolution, and the like.

A printer fabricates an object from a computerized model using a fused filament fabrication process. The shape of an extrusion nozzle may be varied during extrusion to control, e.g., an amount of build material deposited, a shape of extrudate exiting the nozzle, a feature resolution, and the like.

A printer fabricates an object from a computerized model using a fused filament fabrication process. The exit of the nozzle may include a number of concentric rings, where each of which may be selectively opened or closed during extrusion to control extrusion properties such as a volume of extrudate or a mixture of material exiting the nozzle.

A printer fabricates an object from a computerized model using a fused filament fabrication process. The exit of the nozzle may include a number of concentric rings, where each of which may be selectively opened or closed during extrusion to control extrusion properties such as a volume of extrudate or a mixture of material exiting the nozzle.

An iron-based rare earth boron-based isotropic nanocomposite magnet alloy including: an alloy composition having a formula T.sub.100-x-y-z(B.sub.1-nC.sub.n).sub.xRE.sub.yZr.sub.zM.sub.m where T includes Fe, RE includes at least Nd, M is at least one of Al, Si, V, Cr, Ti, Mn, Cu, Zn, Ga, Nb, Mo, Ag, Hf, Ta, W, Pt, Au, and Pb, 4.2 atom %x5.0 atom %, 12.5 atom %y14.0 atom %, 0 atom %<z2.0 atom %, 0.0 atom %m5.0 atom %, and 0.0n0.5; and the magnet alloy includes a main phase having a RE.sub.2Fe.sub.14B tetragonal compound with a B content concentration lower than a stoichiometric composition of the RE.sub.2Fe.sub.14B tetragonal compound, and a grain boundary phase comprising a phase richer in Fe than the main phase surrounding the main phase, and the tetragonal compound is finer than a critical single-domain diameter of an average crystal grain size of 10 nm to less than 70 nm.

A nanocrystalline alloy soft magnetic powder contains: impurities; and a composition represented by a composition formula Fe.sub.aCu.sub.bNb.sub.c(Si.sub.1-x(B.sub.1-yCr.sub.y).sub.x).sub.100-a-b-c-dS.sub.d represented by an atomic ratio, where a, b, c, d, x, and y satisfy 75.5a79.5, 0.3b2.0, 2.0c4.0, 0.001d0.080, 0.55x0.91, and 0y0.185. The nanocrystalline alloy soft magnetic powder has crystal grains having a crystallite diameter of 1.0 nm or more and 30.0 nm or less, a particle diameter D10 is 7.0 m or more and 15.0 m or less, and a particle diameter D50 is 22.0 m or more and 32.0 m or less.