Technical note Formation of SiC - AlN solid solution via high energy ball milling and subsequent heat treatment

Metal matrix multicomponent alloys and others based on the Ti+Ti6Si2B phases are potentially attractive for structural applications. However, there is limited information in literature on the effect of alloying in stability of the Ti6Si2B compound, which presents its single-phase region close to Ti-22Si-11B alloy composition (at.-%). In this sense, this work discusses on the effect of copper addition on the stability of the Ti6Si2B compound. Elemental powder mixtures were used to prepare the Ti-xCu-22Si-11B (x=2 and 6 at.-%) alloys by high-energy ball milling and subsequent heat treatment (1100oC for 240 minutes). The as-milled Ti-Cu-Si-B powders and heat-treated samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS). Similar behavior was noted during ball milling of Ti-Cu-Si-B powders, i.e., the Ti5Si3 phase was formed after milling for 180 minutes. The mechanically alloyed and heat treated Ti-2Cu-22Si-11B alloy presented a matrix of Ti6Si2B dissolving close to 2 at.-% Cu. Precipitates of Ti5Si3 and other unknown Cu-and Fe-rich phase were also identified in microstructures of these quaternary alloys, whose amounts were increased in the mechanical alloyed and heat treated Ti-6Cu-22Si-11B alloy.

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Formation of TiB2/TiN nanocomposite powder by high energy ball milling and subsequent heat treatment

Materials Science and Engineering A ◽

10.1016/s0921-5093(01)01499-x ◽

2002 ◽

Vol 326 (2) ◽

pp. 270-275 ◽

Cited By ~ 21

Author(s):

Jianlin Li ◽

Keao Hu ◽

Yong Zhou

Keyword(s):

Heat Treatment ◽

Ball Milling ◽

High Energy ◽

High Energy Ball Milling ◽

Subsequent Heat Treatment ◽

Nanocomposite Powder ◽

Energy Ball

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Formation of Ni3Ta, Ni2Ta and NiTa by High-Energy Ball Milling and Subsequent Heat Treatment

Materials Science Forum ◽

10.4028/www.scientific.net/msf.869.423 ◽

2016 ◽

Vol 869 ◽

pp. 423-428

Author(s):

Hanna Stefanni Nunes Benites ◽

Bruna Pereira da Silva ◽

Antonio Augusto Araújo Pinto da Silva ◽

Belmira Benedita de Lima ◽

Gilberto Carvalho Coelho ◽

...

Keyword(s):

Heat Treatment ◽

Ball Milling ◽

Weight Ratio ◽

High Energy ◽

High Energy Ball Milling ◽

Subsequent Heat Treatment ◽

Mechanically Alloyed ◽

Heat Treated ◽

Energy Ball ◽

Steel Balls

The present work reports on the formation of Ni3Ta, Ni2Ta and NiTa by high-energy ball milling and subsequent heat treatment. The elemental Ni-25Ta, Ni-33Ta and Ni-50Ta (at.-%) powder mixtures were ball milled under Ar atmosphere using stainless steel balls and vials as well as 300 rpm and a ball-to-powder weight ratio of 10:1. Following, the as-milled samples were uniaxially compacted and heat-treated under Ar atmosphere at 1100°C for 4h. The characterization of as-milled and heat-treated samples was conducted by means of X-ray diffraction, scanning electron microscopy, and energy dispersive spectrometry techniques. Supersaturated solid solutions were formed during ball milling of the Ni-25Ta, Ni-33Ta and Ni-50Ta powders. A large amount of Ni3Ta, Ni2Ta and NiTa was formed in the mechanically alloyed heat-treated Ni-25Ta, Ni-33Ta and Ni-50Ta alloys, respectively.

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