Formation of the intermetallic compound PtZn at room temperature

1955 ◽  
Vol 3 (3) ◽  
pp. 302-304 ◽  
Author(s):  
H.H. Uhlig ◽  
J.S. MacNairn ◽  
D.A. Vaughn
Keyword(s):  
Intermetallic Compound ◽  
Room Temperature

scholarly journals Synthesis of Sn/Ag–Sn nanoparticles via room temperature galvanic reaction and diffusion

RSC Advances ◽  
2019 ◽  
Vol 9 (38) ◽  
pp. 21786-21792 ◽  
Author(s):  
Min Jia Saw ◽  
Mai Thanh Nguyen ◽  
Shilei Zhu ◽  
Yongming Wang ◽  
Tetsu Yonezawa
Keyword(s):  
Intermetallic Compound ◽  
Room Temperature ◽  
And Diffusion ◽  
Reaction And Diffusion

Coating of Ag–Sn intermetallic compound on Sn nanoparticles at room temperature.

Hydrosilylation of carbonyls over electron-enriched Ni sites of intermetallic compound Ni3Ga heterogeneous catalyst

2021 ◽  
Author(s):  
Tomoaki Takayama ◽  
Rio Kariya ◽  
Yuki Nakaya ◽  
Shinya Furukawa ◽  
Seiji Yamazoe ◽  
...  
Keyword(s):  
Intermetallic Compound ◽  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
Aldehydes And Ketones

Nanoparticulate intermetallic compound Ni3Ga supported on SiO2 has emerged as a highly efficient catalyst for the hydrosilylation of carbonyls, such as aldehydes and ketones, at room temperature.

Effect of Sr and Nd on Microstructure and Mechanical Properties of AZ91-1Si Alloy

2009 ◽  
Vol 610-613 ◽  
pp. 765-770 ◽  
Author(s):  
Zhi Wen Zou ◽  
Shou Mei Xiong
Keyword(s):  
Mechanical Properties ◽  
Trace Elements ◽  
Intermetallic Compound ◽  
Grain Refinement ◽  
Room Temperature ◽  
Chinese Script ◽  
Mg2si Phase ◽  
Microstructure And Mechanical Properties ◽  
Refinement Mechanism ◽  
Morphology Modification

In present work, trace elements Sr and Nd were added into AZ91-1wt%Si alloys. The alloys were cast into a permanent mould and then machined into test bars. The microstructure and mechanical properties at room temperature of the specimens were investigated. Results showed that complicated Chinese script Mg2Si phase decreased in size with the increase of Sr addition. When Sr addition increased to 0.1wt%, the Mg2Si phase was changed from Chinese script shape into uniform polygon shape completely. At the same time, mechanical properties improved due to the morphology modification of the Mg2Si phase. An intermetallic compound containing Mg, Al, Nd and Si was found when Nd was added to the alloy. Remarkable modification on the shape and distribution of the Mg2Si phase was observed because of the intermetallic compound, which leads to a great change in mechanical properties. The grain refinement mechanism of Sr and Nd elements on the Mg2Si phase was discussed.

Formation of Al-Based Intermetallic Compound under Ion Implantation at Lower Temperature

2007 ◽  
Vol 561-565 ◽  
pp. 1729-1732 ◽  
Author(s):  
Hisao Kinoshita ◽  
N. Sakaguch ◽  
S. Watanabe ◽  
H. Takahashil ◽  
Masayoshi Kawai ◽  
...  
Keyword(s):  
Intermetallic Compound ◽  
Ion Implantation ◽  
Room Temperature ◽  
Ion Irradiation ◽  
Nucleation Site ◽  
Enhanced Diffusion ◽  
Ion Accelerator ◽  
Preferential Nucleation ◽  
Phase Nucleation ◽  
Lower Temperature

The formation process of intermetallic compound under Ni+ion implantation into pure Al was studied at lower temperature below room temperature. Ion implantation was carried out using 250KeV ion accelerator. Cascade damage was introduced Ni+ions implantation at 223K without new phase nucleation. However, when Ni+ions were implanted at room temperature, the grown larger plate-like phases were observed during implantation up to 1x1017 Ni+/cm2. Ni concentration in Al matrix and newly formed phase were 0.3-0.5 and 8.5-13.3at%,respectively. It was identified that the formed phases were close to the ordered orthorhombic structure of Al3Ni type. It was also confirmed from observation with high resolution HVEM that these phases grew with continuous ion implantation. Thus it was clarified that cascades act as preferential nucleation site for intermetallic compound, and the phases nucleated at cascades coalesce in the growth process of each phase during continuous implantation through ion irradiation enhanced diffusion.

Tensile Properties of B2-Type CoTi Intermetallic Compound

2000 ◽  
Vol 646 ◽  
Author(s):  
Y. Kaneno ◽  
T. Takasugi
Keyword(s):  
Mechanical Properties ◽  
Intermetallic Compound ◽  
Room Temperature ◽  
Tensile Elongation ◽  
Tensile Specimen ◽  
Fracture Pattern ◽  
Cross Sectional ◽  
Brittle Ductile Transition ◽  
Treatment Procedures ◽  
Hot Rolled

ABSTRACTB2-type CoTi intermetallic compound that was hot-rolled and recrystallized was tensile-tested as functions of temperature and testing atmosphere. The tensile strength showed a peak at intermediate temperature (∼800K). The brittle-ductile transition (BDT) defined by tensile elongation took place at about 800K, above which large tensile elongation was observed. Corresponding to this transition, SEM fractography showed a change from cleavage-like pattern mixed with intergranular fracture pattern to large cross-sectional reduction, i.e. necking of the tensile specimen. Also, the observed mechanical properties were independent of heat-treatment procedures, indicating that retained vacancies did not affect the mechanical properties of CoTi intermetallic compound. However, the tensile elongation and UTS at room temperature were dependent on testing atmosphere, indicating that moisture-induced embrittlement occurred in CoTi intermetallic compound.

scholarly journals ELECTRON-STIMULATED DESORPTION OF POTASSIUM ATOMS ADSORBED ON THE SURFACE OF GOLD

2020 ◽  
pp. 836-844
Author(s):  
Юрий Александрович Кузнецов ◽  
Михаил Николаевич Лапушкин
Keyword(s):  
Intermetallic Compound ◽  
Excitation Energy ◽  
Room Temperature ◽  
Intermetallic Layer ◽  
Gold Layer ◽  
The Core ◽  
Tungsten Surface ◽  
Electron Stimulated Desorption

Создан ультратонкий слой интерметаллида KAu при комнатной температуре при напылении атомов калия на слой адсорбированного золота на поверхности вольфрама. Исследованы процессы электронно-стимулированной десорбции атомов K с поверхности KAu. Найдены квазирезонансные пики в зависимости выхода ЭСД от энергии возбуждения при 64 и 82 эВ, которые соответствуют возбуждению остовных уровней Au 5р и Au 5р. Полученные результаты свидетельствуют о формировании KAu различной стехиометрии: от KAu до KAu. Показано, что интерметаллид KAu, полученный при комнатной температуре, как полученный ранее KAu при 1000K, является полупроводником. Предложена модель электронно-стимулированной десорбции атомов K в системе K/KAu/Au/W. An ultrathin intermetallic layer KAuwas created at room temperature by depositing potassium atoms on adsorbed gold layer on the tungsten surface. The processes of electron-stimulated desorption of K atoms from the KAu surface are investigated. Quasi-resonance peaks are found in the dependence of the ESD yield on the excitation energy at 64 and 82 eV, which correspond to the excitation of the core levels Au 5p and Au 5p. The obtained results indicate the formation KAu of different stoichiometry: from KAu to KAu . It is shown that the intermetallic compound KAu created at room temperature is a semiconductor, as it was previously obtained at 1000 K. A model of electron-stimulated desorption of K atoms in the K / KAu / Au / W system is proposed.

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