Mechano-synthesis of Invar Alloy with Nb Additions
Diamond tools used to slab ornamental stones are composites made of diamond particles embedded into a bonding matrix.These composites are normally manufactured by powder metallurgy.This paper deals with the development of a new alloy to adhere diamonds – bonding matrix.In this sense,mechanical alloying(MA)was used to produce powders of Invar alloy(Fe-36%wtNi)with Nb additions(5-10-15%wt).MA experiments employed different milling times: 1-2.5-5-10-20h,using the ball to powder ratio of 10:1.Powders morphologies and sizes were studied by scanning electron microscopy(SEM)– diffusion study were performed by EDS coupled to the SEM; X-ray diffraction was used to evaluate the diffusion and solid solution formation.Scherrer′s equation was employed to determine the mean crystallites size; the lattices micro-strain was calculated trough proposed equation by the works of Nekouei and Maia; particles sizes distribution and mean particle size were also determined.The results have shown that 15%wt Nb addition with 10h of milling time generated better homogeneity,improved distribution and average particle size,along with complete solid solution formation.
Fe-Ni-Nb alloy INVAR alloy Diamond cutting tools Powder metallurgy Mechano-synthesis
Araujo Carolina M. Aquino Gabriel M. Coelho Gabriel N.A. Lugon Rafael D. Guimar(a)es Renan S. Filgueira Marcello
Laboratory of Advanced Materials,State University of North Fluminense-UENF/CCT/LAMAV,Alberto Lamego Avenue,2000,Parque Califórnia,28013-602-Campos dos Goytacazes/RJ-Brazil
国际会议
北京
英文
1098-1106
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）