Powder metallurgy of the porous Ti-13Nb-13Zr alloy of different powder grain size

2019 ◽  
Vol 34 (8) ◽  
pp. 915-920 ◽  
Author(s):  
Tomasz Seramak ◽  
Andrzej Zielinski ◽  
Waldemar Serbinski ◽  
Katarzyna Zasinska
Keyword(s):  
Grain Size ◽  
Powder Metallurgy ◽  
Porous Ti ◽  
13Zr Alloy

scholarly journals Study on the erosion of Mo/ZrO2 alloys in glass melting process

2020 ◽  
Vol 39 (1) ◽  
pp. 595-598
Author(s):  
Cui Chaopeng ◽  
Zhu Xiangwei ◽  
Li Qiang ◽  
Zhang Min ◽  
Zhu Guangping
Keyword(s):  
Grain Size ◽  
Corrosion Resistance ◽  
Powder Metallurgy ◽  
Hydrothermal Synthesis ◽  
Grain Boundaries ◽  
Electrode Material ◽  
Glass Melting ◽  
Melting Process ◽  
Fine Grain ◽  
Conventional Electrode

AbstractThe Mo/ZrO2 electrode was prepared by combining hydrothermal synthesis with powder metallurgy, and this new electrode material has a totally different microstructure from the conventional electrode. The grain size of the new electrode was fine, and the size of ZrO2 in the alloy reached 200 nm. According to the results, the Mo–ZrO2 electrode has better performance, because the erosion occurs along the grain boundaries. Meanwhile, the new electrode, based on its fine grain, can effectively improve the corrosion resistance of the electrode.

Effect of Sintering Time on the Density, Porosity Content and Microstructure of Copper – 1 wt. % Silicon Carbide Composites

2014 ◽  
Vol 1064 ◽  
pp. 32-37 ◽  
Author(s):  
Mohammed A. Almomani ◽  
Ahmad M. Shatnawi ◽  
Mohammed K. Alrashdan
Keyword(s):  
Silicon Carbide ◽  
Grain Size ◽  
High Pressure ◽  
Powder Metallurgy ◽  
Surface Energy ◽  
Sintered Density ◽  
Compaction Pressure ◽  
Boundary Surface ◽  
Sintering Time ◽  
Diffusion Enhancement

In this paper, several copper matrixes reinforced with 1 wt. % silicon carbide (SiC) were fabricated using powder metallurgy (PM). The effect of sintering time (30 min, 60 min, 90 min, and 180 min) on composite density and porosity, and grain size were investigated. The results showed that longer sintering time gives higher sintered density, and smaller porosity content. This is due to the diffusion enhancement, which leads to reduce pore size, and close porosities. Also, for a given compaction pressure, the grains tend to be coarser for longer sintering time, due to the materials tendency to reduce grain boundary surface energy. In addition, samples compacted at high pressure have finer grain than corresponding grains compacted at low pressure but sintered for the same time.

Synthesis of porous Ti–50Ta alloy by powder metallurgy

2018 ◽  
Vol 142 ◽  
pp. 124-136 ◽  
Author(s):  
Grzegorz Dercz ◽  
Izabela Matuła ◽  
Maciej Zubko ◽  
Alicja Kazek-Kęsik ◽  
Joanna Maszybrocka ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Porous Ti

Effect of Hydrogenation Pressure on Microstructure and Mechanical Properties of Ti-13Nb-13Zr Alloy Produced by Powder Metallurgy

2010 ◽  
Vol 660-661 ◽  
pp. 176-181
Author(s):  
José Hélio Duvaizem ◽  
Gabriel Souza Galdino ◽  
Ana Helena A. Bressiani ◽  
Rubens Nunes de Faria Jr. ◽  
Hidetoshi Takiishi
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Powder Metallurgy ◽  
High Energy ◽  
Dynamic Mechanical Analyzer ◽  
Powder Alloys ◽  
Microstructure And Mechanical Properties ◽  
13Zr Alloy ◽  
Displacement System ◽  
Liquid Displacement

The effects of the hydrogenation stage on microstructure and mechanical properties of Ti-13Nb-13Zr alloy produced by powder metallurgy have been studied. Powder alloys have been produced by hydrogenation with 250 MPa or 1 GPa and via high energy planetary ball milling. Samples were isostatically pressed at 200 MPa and sintered at 1150 °C for 7, 10 and 13 hours. Elastic modulus and microhardness were determined using a dynamic mechanical analyzer (DMA) and a Vickers microhardness tester. Density of the samples was measured using a liquid displacement system. Microstructure and phases presents were analyzed employing scanning electron microscopy (SEM). Elastic modulus was 81.3  0.8 and 62.6  0.6 GPa for samples produced by 250 MPa and 1 GPa hydrogenation, respectively when sintered for 7h.

Effect of Heat Treatment on Microstructure and Mechanical Properties of Ti-13Nb-13Zr Alloy Produced by Powder Metallurgy

2014 ◽  
Vol 802 ◽  
pp. 457-461 ◽  
Author(s):  
José Hélio Duvaizem ◽  
N.M.F. Mendes ◽  
J.C.S. Casini ◽  
A.H. Bressiani ◽  
H. Takiishi
Keyword(s):  
Heat Treatment ◽  
Elastic Modulus ◽  
Powder Metallurgy ◽  
Phase Precipitation ◽  
X Ray Diffraction ◽  
Dynamic Mechanical Analyzer ◽  
X Ray ◽  
Α Phase ◽  
13Zr Alloy ◽  
Scanning Electron

Ti-13Nb-13Zr alloy produced via powder metallurgy was submitted to heat treatment under various conditions and the effects on microstructure and elastic modulus were investigated. Heat treatment was performed using temperatures above and below α/β transus combined with different cooling rates – furnace cooling and water quenching. Microstructure and phases were analyzed employing scanning electron microscopy and X-ray diffraction. Elastic Modulus was determined using a dynamic mechanical analyzer (DMA). The results indicated that α phase precipitation and elastic modulus values increased after heat treatment performed using temperature below α/β transus. However, when it was performed above α/β transus and using higher cooling rate, a decrease in elastic modulus was observed despite higher α phase precipitation, indicating that the microstructural modifications observed via SEM, due to the presence of martensitic α phase, influenced on elastic modulus values.

scholarly journals Microstructure and Porosity Evolution of the Ti–35Zr Biomedical Alloy Produced by Elemental Powder Metallurgy

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4539
Author(s):  
Izabela Matuła ◽  
Grzegorz Dercz ◽  
Maciej Zubko ◽  
Joanna Maszybrocka ◽  
Justyna Jurek-Suliga ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Volume Fraction ◽  
Production Method ◽  
Cold Isostatic Pressing ◽  
Metallic Materials ◽  
X Ray Diffraction ◽  
Isostatic Pressing ◽  
Porosity Evolution ◽  
Porous Ti ◽  
Zr Alloys

In the present study, the structure and porosity of binary Ti–35Zr (wt.%) alloy were investigated, allowing to consider powder metallurgy as a production method for new metallic materials for potential medical applications. The porous Ti–Zr alloys were obtained by milling, cold isostatic pressing and sintering. The pressure during cold isostatic pressing was a changing parameter and was respectively 250, 500, 750 and 1000 MPa. The X-ray diffraction study revealed only the α phase, which corresponds to the Ti–Zr phase diagram. The microstructure of the Ti–35Zr was observed by optical microscopy and scanning electron microscopy. These observations revealed that the volume fraction of the pores decreased from over 20% to about 7% with increasing pressure during the cold isostatic pressing. The microhardness measurements showed changes from 137 HV0.5 to 225 HV0.5.

Measurement of Sub-Micron Sized Grains in a Powder Metallurgy Alloy

1981 ◽  
Vol 39 ◽  
pp. 62-63
Author(s):  
D. M. Anderson ◽  
E. J. Coyne
Keyword(s):  
Grain Size ◽  
Powder Metallurgy ◽  
Elevated Temperatures ◽  
Sheet Material ◽  
Ingot Metallurgy ◽  
Matrix Composites ◽  
Mechanically Alloyed ◽  
New Concepts ◽  
Technology Corporation ◽  
The Stability

New concepts in airframe materials, including powder metallurgy (P/M) alloys and metal matrix composites, have been offered to aircraft manufacturers. These new materials have been suggested as alternatives to conventional ingot metallurgy products now used in airframes. Aircraft manufacturers must evaluate these materials to determine their suitability for airframe use. The stability of the small uniform grain size of prospective P/M alloys was a major concern since some of the proposed fabrication processes involved elevated temperatures. These processes typically have caused grain growth and loss of material properties in ingot materials.A mechanically alloyed, non-heat-treatable, P/M aluminum alloy, IN-9051 is produced by the Novamet Division, MPD Technology Corporation, an Inco Company. Previous research had indicated that elevated temperatures might adversely affect this material's properties. The effect of 16 combinations of elevated temperatures (600-900° F) and times at temperature on the grain size of each of three different extrusions was measured. A similar, but abbreviated, program on sheet material rolled from these extrusions was also conducted.

Sign in / Sign up

Export Citation Format

Share Document