of sintered coating layers this microstructure is somewhat analogous to an equiaxed grain microstructure with a continuous grain boundary phase except that it does not require the use of alloy constituents having thermodynamic phase equilibria properties that are capable of producing such a structure rather this equiaxed dispersed particle structure and cellular nanomatrix 416 of sintered metallic coating layers 216 may be produced using constituents where thermodynamic phase equilibrium conditions would not produce an equiaxed structure the equiaxed morphology of the dispersed particles 414 and cellular network 416 of particle layers results from sintering and deformation of the powder particles 212 as they are compacted and interdiffuse and deform to fill the interparticle spaces 215 fig3 the sintering temperatures and pressures may be selected to ensure that the density of powder compact 400 achieves substantially full theoretical density in an exemplary embodiment as illustrated in fig3 and 5 dispersed particles 414 are formed from particle cores 214 dispersed in the cellular nanomatrix 416 of sintered metallic coating layers 216 and the nanomatrix 416 includes a solid state metallurgical bond 417 or bond layer 419 as illustrated schematically in fig6 extending between the dispersed particles 414 throughout the cellular nanomatrix 416 that is formed at a sintering temperature t s where t s is less than t c and t p as indicated solid state metallurgical bond 417 is formed in the solid state by solid state interdiffusion between the coating layers 216 of adjacent powder particles 212 that are compressed into touching contact during the compaction and sintering processes used to form powder compact 400 as described herein as such sintered coating layers 216 of cellular nanomatrix 416 include.