[1] [1] A. Mortensen, S. Suresh. Functionally graded metals and metal-ceramic composites. Part 1 Processing[J]. International Materials Reviews, 1995, 40(6): 239~265

[3] [3] J. H. Abboud, R. D. Rawlings, D. R. F. West. Functionally graded nickel-aluminide and iron-aluminide coating sproduced via laser cladding[J]. J. Mater. Sci., 1995, 30: 5931～5938

[4] [4] F. J. Kahlen, A. Von Klitzing, H. Kar. Hardness chemical and microstructural studies for laser-fabricated metal parts of graded materials[J]. Laser Institute of America, Laser Materials Processing, 1999, 87 Part 2(USA): F129～F137

[5] [5] C. L. Atwood, M. L. Griffith, L. D. Harwell et al.. Laser spray fabrication for net-shape rapid product realization LDRD[R]. Sandia Report, 1999

[6] [6] T. Seefeld, C. Theiler, E. Schubert et al.. Laser generation of graded metal-carbide components[J]. Materials Science Forum., 1999, 308～311: 459～466

[7] [7] J. Th. M. De Hosson, Y. T. Pei. Functionally graded materials produced by laser cladding[J]. Acta Mater., 2000, 48: 2617～2624

[11] [11] M. L. Griffitha, M. E. Schlienger, L. D. Harwella et al.. Understanding thermal behavior in the LENS process[J]. Materials and Design, 1999, 20: 107～113