MECHANISTIC ASPECTS OF SHOCK-INDUCED REACTIONS IN NI+AL POWDER MIXTURES

2008 ◽  
Author(s):  
Daniel E. Eakins ◽  
Naresh. N. Thadhani ◽  
Mark Elert ◽  
Michael D. Furnish ◽  
Ricky Chau ◽  
...  
Keyword(s):  
Powder Mixtures ◽  
Al Powder

Porous TiAl alloys fabricated by sintering of TiH 2 and Al powder mixtures

2016 ◽  
Vol 656 ◽  
pp. 530-538 ◽  
Author(s):  
Qin Peng ◽  
Bin Yang ◽  
Libin Liu ◽  
Changjiang Song ◽  
Bernd Friedrich
Keyword(s):  
Powder Mixtures ◽  
Tial Alloys ◽  
Al Powder

scholarly journals Mechanical Alloying of Ti–Al Powder Mixtures under Nitrogen Atmosphere

1993 ◽  
Vol 34 (10) ◽  
pp. 952-959 ◽  
Author(s):  
Masamichi Miki ◽  
Tohru Yamasaki ◽  
Yoshikiyo Ogino
Keyword(s):  
Mechanical Alloying ◽  
Nitrogen Atmosphere ◽  
Powder Mixtures ◽  
Al Powder

Nitride formation during combustion of Ti-TiO2 and Ti-Al powder mixtures in air under SHS conditions

2008 ◽  
Vol 44 (5) ◽  
pp. 614-618 ◽  
Author(s):  
Yu. I. Strokova ◽  
A. A. Gromov ◽  
M. Yu. Ponomareva ◽  
V. I. Vereshchagin
Keyword(s):  
Powder Mixtures ◽  
Nitride Formation ◽  
Al Powder

Microstructure of Nb BASED A12O3 Composites

1998 ◽  
Vol 4 (S2) ◽  
pp. 588-589
Author(s):  
C. Scheu ◽  
G. Dehm ◽  
W. D. Kaplan ◽  
D. E. Garcia ◽  
N. Claussen
Keyword(s):  
Ceramic Composites ◽  
Second Phase ◽  
Pressureless Sintering ◽  
Powder Mixtures ◽  
Transmission Electron ◽  
Second Phase Particles ◽  
Wide Range ◽  
Metal Ceramic ◽  
High Resolution Tem ◽  
Al Powder

Metal-ceramic composites possess a wide range of applications due to an increased fracture toughness and strength compared to monolithic materials. A better understanding of the correlation between properties and microstructure of these materials requires a detailed analysis of the phases which form during processing. This can be accomplished by using various transmission electron microscopy (TEM) methods. In this study Nb based AI2O3 composites were investigated. The composites were prepared by pressureless sintering 2 of compacts of attrition milled AI2O3 and prealloyed Nb(Al) powder mixtures. The addition of 7 wt.% of Al to the Nb powder is supposed to assist in rapid and complete sintering of the material. The microstructure was studied in detail by conventional TEM using selected area diffraction (SAD). The chemistry and structure of the occurring phases, second phase particles and grain boundaries were analysed by analytical TEM and high resolution TEM (HRTEM).

scholarly journals Examination of shock-induced reaction in Ni/Al powder mixtures

2020 ◽  
Author(s):  
Anirban Mandal ◽  
Matthew T. Beason ◽  
Brian J. Jensen
Keyword(s):  
Powder Mixtures ◽  
Al Powder ◽  
Induced Reaction

Synthesis of Ti2AlC and Ti3AlC2 by Mechano-Chemical Reaction and Hot Pressing Process

2010 ◽  
Vol 44-47 ◽  
pp. 2509-2513 ◽  
Author(s):  
Jian Ke Liu ◽  
Ruo Xin Yang ◽  
Jian Feng Zhu
Keyword(s):  
Mechanical Properties ◽  
Chemical Reaction ◽  
Layered Structure ◽  
High Purity ◽  
Hot Pressing ◽  
Initial Composition ◽  
Sem Images ◽  
Powder Mixtures ◽  
Al Content ◽  
Al Powder

The mechanically induced self-propagating reaction (MSR) and hot-pressing consolidation were adapted to synthesize Ti2AlC and Ti3AlC2 using Ti, C and Al powder mixtures. The effects of Al content on the microstructure and mechanical properties of fully dense Ti2AlC and Ti3AlC2 were investigated. The results reveal that the Ti3AlC2, TiC and TiAlx transitional phases were formed by mechanically alloying according to the mechanically induced self-propagating reactions (MSR). Through hot pressing the as-milled powders with initial composition of 2Ti/1.5Al/C and 2Ti/Al/C, respectively, at 1100°C for 1 h, the desired high purity Ti2AlC and Ti3AlC2 were produced. SEM images confirmed that the as-fabricated Ti2AlC and Ti3AlC2 grains are plate-like with nanoscale layered structure and dispersed uniformly.

Formation of eutectic RuAl/Ru nanocomposite by mechanical alloying and subsequent annealing

2001 ◽  
Vol 16 (9) ◽  
pp. 2459-2462 ◽  
Author(s):  
K. W. Liu ◽  
F. Mücklich ◽  
R. Birringer
Keyword(s):  
Solid Solution ◽  
Differential Scanning Calorimetry ◽  
Mechanical Alloying ◽  
Heat Release ◽  
Eutectic Composition ◽  
Scanning Calorimetry ◽  
Powder Mixtures ◽  
Al Powder ◽  
Al Matrix ◽  
Milled Powders

No abrupt reaction was observed during mechanical alloying (MA) of Ru and Al powder mixtures with an eutectic composition (Ru70Al30). As-milled powders constitute mainly a Ru(Al) solid solution and/or mixture (matrix), and a very small quantity of RuAl. The complete reaction between Ru and Al during MA was speculated to be hampered by excess Ru in Ru70Al30. No exothermic heat release was detected in differential scanning calorimetry for as-milled powders. Precipitation of RuAl from as-milled Ru(Al) matrix was observed after annealing at various temperatures. The phase fraction of Ru and RuAl reaches an approximately equilibrium value after annealing at 1173 K.

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