Structure and Properties of Phases on Bounderies of Iron Boride—Metal Matrix

MICC 90 ◽  
1991 ◽  
pp. 529-532
Author(s):  
Irina M. Spiridonova ◽  
Elena V. Sukhovaya ◽  
Yuriy S. Shmelev
Keyword(s):  
Metal Matrix ◽  
Structure And Properties ◽  
Iron Boride

scholarly journals Structure and Properties of Ti/TiB Metal-Matrix Composite after Isothermal Multiaxial Forging

2018 ◽  
Vol 134 (3) ◽  
pp. 695-698 ◽  
Author(s):  
S. Zherebtsov ◽  
M. Ozerov ◽  
N. Stepanov ◽  
M. Klimova
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Structure And Properties

Structure and properties of metal-matrix composite

1994 ◽  
Vol 13 (7) ◽  
pp. 541-544 ◽  
Author(s):  
N. Karni ◽  
G. B. Barkay ◽  
M. Bamberger
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Structure And Properties

Influence of the chemical composition of the matrix on the structure and properties of monolithic SHS composites

2021 ◽  
Vol 23 (3) ◽  
pp. 124-138
Author(s):  
Nataliya Pugacheva ◽  
◽  
Yuri Nikolin ◽  
Tatiana Bykova ◽  
Ekaterina Senaeva ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Metal Matrix ◽  
Bending Strength ◽  
Materials Science ◽  
Hydraulic Press ◽  
Synthesis Process ◽  
Powder Materials ◽  
Structure And Properties ◽  
Transverse Bending ◽  
The Matrix

Introduction. The development of new wear-resistant materials obtained by the method of self-propagating high-temperature synthesis (SHS) is an urgent problem in materials science. The SHS method is most widely used in the field of creating new powder materials. Much less attention has been paid to the production of monolithic non-porous composites. For monolithic composites, it is very important to identify the role of the metal matrix and phase transformations in the process of secondary structure formation after the completion of the synthesis process when the obtained material is cooled. The aim of this work was to carry out a comparative analysis of the structure and properties of SHS composites of the Fe-Ti-C-B, Fe-Ni-Ti-C-B, Fe-Ni-Cr-Ti-C-B, and Cu-TiC-B systems. Materials and research methods. Composites were obtained from powder mixtures consisting of thermoreactive components Ti, C, and B, as well as matrix Fe, Fe-Ni, Fe-Ni-Cr, and Cu. The initial powders were thoroughly mixed, loaded into a steel tube container, and the powder mixture was preliminary compacted. Then, the workpieces were heated in an electric furnace to the temperature of the onset of autoignition. After completion of the SHS, the workpieces were deformed with a force of 250 MPa in a hydraulic press at a temperature not lower than 1000 ° C. Samples were cut from the obtained sandwich plates for microstructural studies, density determination, hardness measurements, transverse bending tests and abrasive wear resistance tests. Results and discussion. All investigated composites were characterized by an uneven distribution of strengthening particles TiC and TiB2 over the volume. The use of the Fe-Ni matrix led to the formation of regions with the γ-Fe + Fe2B eutectic structure in the composite and an additional strengthening phase Ni3Ti. The use of Fe-Ni-Cr metal-matrix components led to the formation of two solid solutions in the matrix - austenite and ferrite, and Cr23C6 particles were formed along the boundaries of austenite grains. The maximum transverse bending strength was shown by SHS composites of the Fe-Ti-C-B and Cu-Ti-C-B systems with a matrix of FCC solid solutions. All composites had a hardness of 66 -72 HRC and showed the same abrasion resistance.

Development of Boron Hydrides as Reinforcing Components for Composite Materials

2008 ◽  
Vol 587-588 ◽  
pp. 197-201 ◽  
Author(s):  
Vladimir A. Popov ◽  
K.Y. Zhizhin ◽  
E.A. Malinina ◽  
V.M. Retivov ◽  
K.P. Staudhammer ◽  
...  
Keyword(s):  
Metal Matrix ◽  
High Strength ◽  
Point Of View ◽  
Low Density ◽  
Matrix Composites ◽  
Structure And Properties ◽  
Boron Hydrides ◽  
Novel Materials ◽  
Lower Weight ◽  
Derivatives Of

In recent years, industries have increasingly demanded novel materials of low density (and, therefore, weight) and high strength. Such materials are required for all kinds of transport, especially for automobile and aviation industries. Lower weight vehicles would allow for reduced fuel consumption, which increases the transportation efficiency (the economical point of view) and a corresponding decrease of emission of pollutants to the atmosphere (the ecological point of view). This is why the development of materials with decreased densities is of great importance. The aim of this study was to develop novel materials as reinforcing elements for metal matrix composites. Boron crystalline compounds are proposed to be used, including the derivatives of higher boron– hydrogen anions BnXn 2- n = 10,12, X = H (in some cases – halogen, for example, Cl) as their respective densities meet the criteria. The study pursued two goals: (i) to develop a method for producing these boron hydrides and (ii) to investigate the structure and properties of these boron hydrides.

Magnetodynamic Mixer-Batcher for Overheating and Pouring of Cast Iron

2010 ◽  
Vol 457 ◽  
pp. 481-486 ◽  
Author(s):  
Viktor I. Dubodelov ◽  
Viktor K. Pogorsky ◽  
Maksym S. Goryuk
Keyword(s):  
Cast Iron ◽  
Metal Matrix ◽  
Inductive Heating ◽  
Structure And Properties ◽  
Furnace Treatment ◽  
Isotropic Structure ◽  
Grey Cast ◽  
Graphite Inclusions ◽  
Mould Casting ◽  
Rotor Casting

Magnetodynamic mixer-batcher is intended for adjustable inductive heating and controlled electromagnetic pouring of cast iron into crystallizers and moulds on automated casting lines, chill-mould casting machines, rotor casting machines. Also, mixer-batcher allows realizing the out-of-furnace treatment of liquid alloys. In comparison with conventional ladle pouring of grey cast iron, application of magnetodynamic mixer-batcher allows to reach more isotropic structure and properties on casting body, to increase 5-10% the mechanical properties of castings, and to refine both the metal matrix structure and dimensions of graphite inclusions. Moreover, using of magneto-dynamic mixers-batchers provides automation of pouring, economy of materials and energy re-sources, increasing productivity, and improvement of ecology.

scholarly journals Manufacturing of Porous Ceramic Preforms Based on Halloysite Nanotubes (Hnts)

2016 ◽  
Vol 61 (2) ◽  
pp. 917-922
Author(s):  
M. Kujawa ◽  
L. A. Dobrzański ◽  
G. Matula ◽  
M. Kremzer ◽  
B. Tomiczek
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Liquid Alloy ◽  
Metal Matrix ◽  
Porous Ceramic ◽  
Halloysite Nanotubes ◽  
Matrix Composites ◽  
Carbon Fibres ◽  
Structure And Properties ◽  
Pressure Infiltration

AbstractThe aim of this study was to determine the influence of manufacturing conditions on the structure and properties of porous halloysite preforms, which during pressure infiltration were soaked with a liquid alloy to obtain a metal matrix composite reinforced by ceramic, and also to find innovative possibilities for the application of mineral nanotubes obtained from halloysite. The method of manufacturing porous ceramic preforms (based on halloysite nanotubes) as semi-finished products that are applicable to modern infiltrated metal matrix composites was shown. The ceramic preforms were manufactured by sintering of halloysite nanotubes (HNT), Natural Nano Company (USA), with the addition of pores and canals forming agent in the form of carbon fibres (Sigrafil C10 M250 UNS SGL Group, the Carbon Company). The resulting porous ceramic skeletons, suggest innovative application capabilities mineral nanotubes obtained from halloysite.

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