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Journal articles on the topic 'Powder compaction'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Xiao, Zhi Yu, Tungwai Leo Ngai, and Yuan Yuan Li. "Investigation on the Densification Mechanism of Warm Compaction." Materials Science Forum 539-543 (March 2007): 2699–705. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.2699.

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Warm compaction is a low cost process to make high density and high performance iron base powder metallurgy parts. Based on results obtained from the dynamic compacting curve, ejection force curve, X-ray diffraction, micro-hardness of iron powder, friction condition and lubricant properties, densification mechanism of warm compaction can be drawn. In the initial stage, the rearrangement of powder particles is the main factor. It contributes more in the densification of warm compaction than that in cold compaction. However, in the later stage, the plastic deformation of powder particles is the

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2

Allen, Robert M., and John E. Smugeresky. "Dynamic Compaction of Rapidly Solidified Al-6%Si Powder." Proceedings, annual meeting, Electron Microscopy Society of America 43 (August 1985): 36–37. http://dx.doi.org/10.1017/s0424820100117261.

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The production of alloy powders by processes involving rapid solidification can yield powder particles which exhibit highly-refined microstructures desireable from a mechanical properties standpoint. Unfortunately, traditional methods for compacting powders into parts often cause significant coarsening of the starting powder microstructure. Alternative methods such as dynamic compaction (the shock-loading of the powder under high stresses) are under study as means of preserving the fine-scale of the starting microstructure throughout the manufacturing of a fully-dense bulk part.The purpose of

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3

Glass, S. Jill, and Kevin G. Ewsuk. "Ceramic Powder Compaction." MRS Bulletin 22, no. 12 (1997): 24–28. http://dx.doi.org/10.1557/s0883769400034709.

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Powder pressing, either uniaxially or isostatically, is the most common method used for high-volume production of ceramic components. The object of a pressing process is to form a net-shaped, homogeneously dense powder compact that is nominally free of defects. A typical pressing operation has three basic steps: (1) filling the mold or die with powder, (2) compacting the powder to a specific size and shape, and (3) ejecting the compact from the die. To optimize a pressing operation, experienced press operators generally understand and control parameters such as die-fill density, die-wall frict

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4

Mironovs, Viktors, Jekaterina Nikitina, Matthias Kolbe, Irina Boiko, and Yulia Usherenko. "Magnetic Pulse Powder Compaction." Metals 15, no. 2 (2025): 155. https://doi.org/10.3390/met15020155.

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Powder metallurgy (PM) offers several advantages over conventional melt metallurgy, including improved homogeneity, fine grain size, and pseudo-alloying capabilities. Transitioning from conventional methods to PM can result in significant enhancements in material properties and production efficiency by eliminating unnecessary process steps. Dynamic compaction techniques, such as impulse and explosive compaction, aim to achieve higher powder density without requiring sintering, further improving PM efficiency. Among these techniques, magnetic pulse compaction (MPC) has gained notable interest d

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5

Xiao, Zhi Yu, M. Y. Ke, Wei Ping Chen, D. H. Ni, and Yuan Yuan Li. "A Study on Warm Compacting Behaviors of 316L Stainless Steel Powder." Materials Science Forum 471-472 (December 2004): 443–47. http://dx.doi.org/10.4028/www.scientific.net/msf.471-472.443.

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The application of warm compaction in stainless steel powders has not been formally reported by now. In this paper, the warm compacting behavior of 316L stainless steel powders had been studied. Results showed that warm compaction was effective in improving the green density and strength of 316L stainless steel powders. Under the compacting pressure of 800 MPa, warm compacted density was 0.20 g/cm3 higher than cold compacted one, and green strength was 52% higher. The optimum warm compacting temperature was 110±10°C. With die wall lubricated warm compaction, the internal lubricant content can

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6

Ke, Mei Yuan. "Warm Compacting Behaviors and Sintering Performance of 316L Stainless Steel Powder." Advanced Materials Research 538-541 (June 2012): 1088–91. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.1088.

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Warm compacting behavior and sintering performance of 316L stainless steel powders were studied. Results showed that green density and strength of samples made in warm compaction were much higher than that in cold compaction. Under pressure of 700MPa, green density and strength in warm compaction were 7.01 g•cm-3and 30.7MPa, which were higher than cold compaction by 0.19 g•cm-3and 10.7MPa. When sintered in hydrogen-nitrogen atmosphere for 60 minutes, sintered density, tensile strength and elongation all increased with the rise of sintering temperature. At 1300°C, Sintered density, tensile stre

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7

Sinka, Csaba. "Modelling Powder Compaction." KONA Powder and Particle Journal 25 (2007): 4–22. http://dx.doi.org/10.14356/kona.2007005.

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8

Chen, Qun, and Yuzhi Li. "SGC Tests for Influence of Material Composition on Compaction Characteristic of Asphalt Mixtures." Scientific World Journal 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/735640.

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Compaction characteristic of the surface layer asphalt mixture (13-type gradation mixture) was studied using Superpave gyratory compactor (SGC) simulative compaction tests. Based on analysis of densification curve of gyratory compaction, influence rules of the contents of mineral aggregates of all sizes and asphalt on compaction characteristic of asphalt mixtures were obtained. SGC Tests show that, for the mixture with a bigger content of asphalt, its density increases faster, that there is an optimal amount of fine aggregates for optimal compaction and that an appropriate amount of mineral po

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9

Sano, Yukio. "A Theoretical Derivation of the Similarity of Dynamic Compaction Processes of Powder Media in Dies." Journal of Engineering Materials and Technology 108, no. 2 (1986): 147–52. http://dx.doi.org/10.1115/1.3225852.

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Multiple shock compactions of powder media within a die with a rigid punch are theoretically investigated. First, similarity of dynamic compaction processes for a powder medium of a simple type is exhibited through nondimensionalized one-dimensional equations. The similarity is established after determination of three parameters, i.e., the ratio S* of the lateral surface to the cross-sectional area of the medium, the ratio M* of the mass of the punch to that of the powder medium filled in the die, and the compaction energy per unit powder volume e. The similarity indicates that the particle ve

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10

Abu Fara, Deeb, Iyad Rashid, Linda Al-Hmoud, Babur Z. Chowdhry, and Adnan A. Badwan. "A New Perspective of Multiple Roller Compaction of Microcrystalline Cellulose for Overcoming Re-Compression Drawbacks in Tableting Processing." Applied Sciences 10, no. 14 (2020): 4787. http://dx.doi.org/10.3390/app10144787.

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In this paper, new scientific insights in relation to the re-compaction of microcrystalline cellulose (MCC; Avicel®® PH-101) under specific compaction conditions are reported. MCC was subjected to multiple compaction cycles (1st, 2nd, and 3rd) under high compaction pressures, up to 20,000 kPa, using a roller compactor of 100 kg/h capacity. Initially, granules from the 1st and 2nd compaction cycles produced tablets with lower crushing strength compared to those made from the original non-compacted MCC. Tablet weakness was found to be correlated to the generation of a higher intra-granular pore

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11

Luo, Liu, Yuchu Sun, and Yongbai Tang. "Cold Compaction Behavior of Unsaturated Titanium Hydride Powders: Validation of Two Compaction Equations." Metals 13, no. 2 (2023): 360. http://dx.doi.org/10.3390/met13020360.

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Unsaturated titanium hydride (TiHX) powder has high formability and is a promising raw material for titanium-based powder metallurgy. In this work, TiH2, TiHX, and HDH Ti powders were characterized, the cold compaction behavior of the powders was investigated, and the densification mechanism was analyzed. The TiHX was a three-phase mixture containing an α plastic phase and δ and ε brittle phases through Rietveld refinement. The TiHX compacts had compressive strength of over 420 MPa (higher than TiH2 and similar to HDHTi) and relative density of over 80% (higher than TiH2 and HDH Ti) at 600 MPa

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12

Dong, Shucheng, Baicheng Wang, Yuchao Song, et al. "Comparative Study on Cold Compaction Behavior of TiH2 Powder and HDH-Ti Powder." Advances in Materials Science and Engineering 2021 (July 26, 2021): 1–15. http://dx.doi.org/10.1155/2021/9999541.

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The compaction mechanism of titanium hydride powder is an important issue because it has a direct impact on density and strength of green compacts and ultimately on the physical and mechanical properties of a final sintered products. In this paper, the characteristics and compaction behavior of titanium hydride and hydrogenation-dehydrogenation titanium powders are comparatively studied and analyzed for better understanding of compaction mechanism of brittle low-strength titanium hydride. The results indicate that the particles of titanium hydride powder are easily crushed under compaction loa

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13

Sano, Yukio, Kiyohiro Miyagi, and Peter Arathoon. "Nonunique Dynamic Equilibrium Constitutive Relation of Metal Powder Depending on its Microstructure." Journal of Engineering Materials and Technology 118, no. 1 (1996): 12–18. http://dx.doi.org/10.1115/1.2805926.

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It was observed in an earlier work by Morimoto et al. [Inst. Phys. Conf. Ser. No. 70, Oxford 1984, p. 427] that the dynamic compact of an aluminium powder medium had greater flakiness and contiguity ratio than the static compact of the same density. This observed difference in micro structure is used to explain their result that the dynamic pressure of the medium is higher than the static pressure for a given density: the degree of rotation of particles during compaction is assumed to decrease for higher strain rates, because of the shorter time available, causing an increase in plastic partic

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14

Hangai, Yoshihiko, Kousuke Zushida, and Hiroaki Yoshida. "Compaction of Commercially Pure Titanium Powder by Friction Powder Compaction Process." MATERIALS TRANSACTIONS 54, no. 2 (2013): 127–29. http://dx.doi.org/10.2320/matertrans.mc201208.

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15

Han, Liang Hao, James Elliott, Serena Best, et al. "Numerical Simulation on Pharmaceutical Powder Compaction." Materials Science Forum 575-578 (April 2008): 560–65. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.560.

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In this paper, we present a modified density-dependent Drucker-Prager Cap (DPC) model with a nonlinear elasticity law developed to describe the compaction behavior of pharmaceutical powders. The model is implemented in ABAQUS with a user subroutine. Using microcrystalline cellulose (MCC) Avicel PH101 as an example, the modified DPC model is calibrated and used for finite element simulations of uniaxial single-ended compaction in a cylindrical die. To validate the proposed model, finite element simulation results of powder compaction are compared with experimental results. It was found that fin

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16

Wu, Chuan Yu, A. C. Bentham, and A. Mills. "Analysis of Failure Mechanisms during Powder Compaction." Materials Science Forum 534-536 (January 2007): 237–40. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.237.

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Powder compaction is a well-established process for manufacturing a wide range of products, including engineering components and pharmaceutical tablets. During powder compaction, the compacts (green bodies or tablets) produced need to sustain their integrity during the process and possess certain strength. Any defects are hence not tolerable during the production. Therefore, understanding failure mechanisms during powder compaction is of practical significance. In this paper, the mechanisms for one typical failure, capping, during the compaction of pharmaceutical powders were explored. Both ex

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17

Lim, Joong Yeon, Jung Min Seo, and Beong Bok Hwang. "A Numerical Analysis of Powdered Metal Compaction Processes for Two-Level Flanged Solid Cylindrical Components." Materials Science Forum 475-479 (January 2005): 3251–54. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.3251.

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A finite element method for the compaction process of metallic powder is introduced in the present work. Basic equations for the finite element formulation are summarized. A yield criterion, which is modified by describing asymmetric behavior of powder metal compacts, is introduced and applied to a certain class of powdered metal compaction processes. Two-level flanged solid cylindrical components are analyzed in three different compacting methods with three different compact geometries. The simulation results are summarized in terms of relative density distribution within compacts, pressure d

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18

Kim, Y. B., J. S. Lee, S. M. Lee, H. J. Park, and G. A. Lee. "Closed-die Compaction of AZO Powder for FE Simulation of Powder Compaction." Transactions of Materials Processing 21, no. 4 (2012): 228–33. http://dx.doi.org/10.5228/kstp.2012.21.4.228.

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19

Popescu, Ileana Nicoleta, and Ruxandra Vidu. "Densification Mechanism, Elastic-Plastic Deformations and Stress-Strain Relations of Compacted Metal-Ceramic Powder Mixtures (Review)." Scientific Bulletin of Valahia University - Materials and Mechanics 16, no. 14 (2018): 7–12. http://dx.doi.org/10.1515/bsmm-2018-0001.

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Abstract The basic purpose of compaction is to obtain a green compact with sufficient strength to withstand further handling operations. The strength of green compact is influenced by the characteristics of the powders (apparent density, particle size and shape, internal pores etc.), the processing parameters (applied force, pressing type, and temperature) and testing conditions (strain rate etc.) Successful powder cold compaction is determined by the densification and structural transformations of powders (metallic powders, ceramic powders and metal-ceramic powder mixtures) during the compact

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20

Mohammadi, K., and Abolfazl Darvizeh. "Dynamic Model of Compaction Process of Metallic Powders." Advanced Materials Research 264-265 (June 2011): 155–59. http://dx.doi.org/10.4028/www.scientific.net/amr.264-265.155.

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Dynamic modeling of compaction process ,and evaluation of hardening parameters of powder compacts undergoing uni-axial/multi compaction is a tedious process and requires many elaborate tests .However ,assuming a two-parameter failure surface ( such as Mohr–Coulomb),evolution of failure surface may be monitored by two points on the failure surface. Results of uni-axial compression and direct or indirect tensile tests may readily provide the two required points. In order to assess this hypothesis ,a laboratory investigation was carried out using atomized iron powder(WPL-200) and aluminum powder(

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21

Polyakov, A. P. "DYNAMIC POWDER COMPACTION PROCESSES." Diagnostics, Resource and Mechanics of materials and structures, no. 2 (April 2018): 42–82. http://dx.doi.org/10.17804/2410-9908.2018.2.042-082.

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22

Felton, Linda A. "Pharmaceutical Powder Compaction Technology." Drug Development and Industrial Pharmacy 38, no. 8 (2012): 1029. http://dx.doi.org/10.3109/03639045.2012.704045.

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23

HIROSE, Norimitsu. "Powder Material for Compaction." Journal of the Japan Society for Technology of Plasticity 56, no. 651 (2015): 285–89. http://dx.doi.org/10.9773/sosei.56.285.

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24

Peck, Garnet E. "Pharmaceutical powder compaction technology." Journal of Controlled Release 42, no. 3 (1996): 302. http://dx.doi.org/10.1016/0168-3659(96)83991-5.

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25

Bortzmeyer, D. "Modelling ceramic powder compaction." Powder Technology 70, no. 2 (1992): 131–39. http://dx.doi.org/10.1016/0032-5910(92)85040-3.

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26

Es-Saheb, M. H. H. "Powder compaction interpretation using the power law." Journal of Materials Science 28, no. 5 (1993): 1269–75. http://dx.doi.org/10.1007/bf01191963.

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27

Laptiev, Anatolii V. "New Die-Compaction Equations for Powders as a Result of Known Equations Correction: Part 2—Modernization of M Yu Balshin’s Equations." Powders 3, no. 1 (2024): 136–53. http://dx.doi.org/10.3390/powders3010009.

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Based on the generalization of M. Yu. Balshin’s well-known equations in the framework of a discrete model of powder compaction process (PCP), two new die-compaction equations for powders have been derived that show the dependence of the compaction pressure p on the relative density ρ of the powder sample. The first equation, p=w(1−ρ0)(n−m)·(ρ−ρ0)n(1−ρ)m, contains, in addition to the initial density ρ0 of the powder in die, three constant parameters—w, n and m. The second equation in the form p=H1−ρ0b−c·ρ−ρ0b1−ρ0c−aρ−ρ0c also takes into account the initial density of the powder and contains fou

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28

Ngai, Tungwai Leo, Zhi Yu Xiao, Yuan Biao Wu, and Yuan Yuan Li. "Studies on Preparation of Ti₃SiC₂ Particulate Reinforced Cu Matrix Composite by Warm Compaction and Its Tribological Behavior." Materials Science Forum 534-536 (January 2007): 929–32. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.929.

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Conventional powder metallurgy processing can produce copper green compacts with density less than 8.3 g/cm3 (a relative density of 93%). Performances of these conventionally compacted materials are substantially lower than their full density counterparts. Warm compaction, which is a simple and economical forming process to prepare high density powder metallurgy parts or materials, was employed to develop a Ti3SiC2 particulate reinforced copper matrix composite with high density, high electrical conductivity and high strength. In order to clarify the warm compaction behaviors of copper powder

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29

Zohoor, Mehdi, and A. Mehdipoor. "Numerical Simulation of Underwater Explosive Compaction Process for Compaction of Tungsten Powder." Materials Science Forum 566 (November 2007): 77–82. http://dx.doi.org/10.4028/www.scientific.net/msf.566.77.

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Underwater explosive compaction is a modified explosive compaction process that is used for manufacturing of parts by compaction of hard powders such as tungsten powder. In the present research work, equation of state (EOS) for tungsten powder was determined by a theoretical method and numerical simulation of the underwater explosive compaction process for tungsten powder was done using LS-DYNA program. The simulation results were utilized for the optimization of die design setups, which were used in our experimental test. Several experiments for compaction of tungsten amorphous powder with a

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30

Sinka, I. C., A. C. F. Cocks, and J. H. Tweed. "Constitutive Data for Powder Compaction Modeling." Journal of Engineering Materials and Technology 123, no. 2 (2000): 176–83. http://dx.doi.org/10.1115/1.1339003.

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The compaction behavior of steel powders, hard metals, and ceramic powders have been investigated using a newly developed high pressure triaxial testing facility. Results from isostatic compaction, simulated closed die compaction, and compaction along different radial loading paths in stress space are presented for six commercial powders. The experimental data are compared and considerations regarding the constitutive modeling of the compaction response of the different classes of materials are presented.

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31

Savielov, Dmytro, Anastasiia Symonova, Ruslan Puzyr, and Olena Kobylska. "Application of complex function solution methods to determine the exciting load required for vibratory compaction of metal powder." Vibroengineering Procedia 57 (December 12, 2024): 1–7. https://doi.org/10.21595/vp.2024.24488.

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This study presents a novel approach to analyzing the vibratory compaction of metal powder using the generalized Kelvin medium rheological model and complex function solution methods. The research derives a theoretical solution for determining the excitation load required for effective compaction, considering key parameters such as oscillation amplitude, frequency, and material properties. The work extends existing analytical methods to accurately represent the damping effects due to internal friction in metal powders. A formula is provided to calculate the necessary surface excitation amplitu

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32

Widyastuti, Rindang Fajarin, Faizah Ali, Sugiarto Putra Wijaya, Eka Nurul Falah, and Iyando Aditiyawan. "Investigation of the Dwelling Time and Compaction Pressure Effect on Mechanical Properties and Microstructure of the Cu-Sn Composite." Key Engineering Materials 939 (January 25, 2023): 57–62. http://dx.doi.org/10.4028/p-y6pg8i.

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Powder metallurgy has become a compatible alternative method in term of manufacturing complex component, such as frangible bullet. A bullet with frangible properties can be manufactured by using copper-based metal matrix composite with tin as the reinforce. During compaction process, the applied load and dwelling time are considered as substantial factor which affect the final product. Therefore, the aim of the present work study is to observe the pressure and the holding time during the compacting process (dwelling time) which has an impact on the mechanical properties of the Cu-Sn composite

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33

Li, Runfeng, Wei Liu, Jiaqi Li, and Jili Liu. "Inverse Identification of Drucker–Prager Cap Model for Ti-6Al-4V Powder Compaction Considering the Shear Stress State." Metals 13, no. 11 (2023): 1837. http://dx.doi.org/10.3390/met13111837.

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Numerical simulation is an important method to investigate powder-compacting processes. The Drucker–Prager cap constitutive model is often utilized in the numerical simulation of powder compaction. The model contains a number of parameters and it requires a series of mechanical experiments to determine the parameters. The inverse identification methods are time-saving alternatives, but most procedures use a flat punch during the powder-compacting process. It does not reflect the densification behavior under a shearing stress state. Here, an inverse identification approach for the Drucker–Prage

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34

Qu, Sheng Guan, Yuan Yuan Li, Wei Xia, and Wei Ping Chen. "Densification Mechanism of Warm Compaction for Iron-Based Powder Materials." Materials Science Forum 534-536 (January 2007): 261–64. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.261.

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An apparatus measuring changes of various forces directly and continuously was developed by a way of direct touch between powders and transmitting force component, which can be used to study forces state of powders during warm compaction. Using the apparatus, warm compaction processes of iron-based powder materials containing different lubricants at different temperatures were studied. Results show that densification of the powder materials can be divided into four stages, in which powder movement changes from robustness to weakness, while its degree of plastic deformation changes from weaknes

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35

Ramesh, Dr D., and Yathish M.G. "Development of Powder Metallurgy Setup for Preparation of Specimens as per ASTM Standards." International Journal of Engineering Research and Applications 14, no. 7 (2024): 06–19. http://dx.doi.org/10.9790/9622-14070619.

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The development of Powder metallurgy to revolutionize manufacturing processes through the utilization of metal powders and its alloys. This innovative approach involves the production of intricate components by compacting and sintering fine metal powders. The development of powder metallurgy setup encompasses a comprehensive exploration of powder metallurgy techniques, emphasizing the advantages of this method, such as enhanced material utilization, reduced waste, and improved mechanical properties. The work begins with an in-depth analysis of various metal powders, their characteristics, and

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36

Ciupitu, Ion, Gabriel Benga, Adela Ionescu, and Danut Savu. "The Improving of the Process of the Iron, the Cast Iron and the Copper Powder Mixing." Materials Science Forum 672 (January 2011): 76–79. http://dx.doi.org/10.4028/www.scientific.net/msf.672.76.

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This paper presents the experimental results concerning the compacting process of some iron, cast iron and copper mixtures. In these mixtures the participation of the cast iron powder to the chemical composition of the mixtures was 5%, 10% and 15% and the participation of the copper powder was 2% and 5%. The paper emphasizes the influence of the carbon content, the cast iron hardness and the cast iron powder content on the mixtures compaction ability at different compacting pressures.

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37

Kang, Choun Sung, S. C. Lee, K. T. Kim, and Oleg Rozenberg. "Densification Behavior of Iron Powder during Cold Stepped Compaction." Materials Science Forum 534-536 (January 2007): 257–60. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.257.

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Densification behavior of iron powder under cold stepped compaction was studied. Experimental data were also obtained for iron powder under cold stepped compaction. The elastoplastic constitutive equation based on the yield function of Shima and Oyane was implemented into a finite element program (ABAQUS) to simulate compaction responses of iron powder during cold stepped compaction. Finite element results were compared with experimental data for densification, deformed geometry and density distribution. The agreement between finite element results and experimental data was very good for iron

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38

XIAO, ZHIYU, LIANG FANG, SHUHUA LUO, and HONGYUN GAO. "STUDY ON COMPLEX SHAPE POWDER METALLURGY IRON-BASED PARTS PREPARED BY WARM FLOW COMPACTION." Journal of Advanced Manufacturing Systems 07, no. 02 (2008): 261–65. http://dx.doi.org/10.1142/s0219686708001565.

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Warm flow compaction based on warm compaction and metal injection molding is a new net-shape manufacturing technology which can produce complex powder metallurgy (PM) parts by conventional axial-pressing. Warm flow compaction makes use of improved flowability of powder binder mixture in an appropriate temperature to form complex PM-parts, like cross-shaped parts. The effect of the combination of coarse and fine powders on apparent density and flowability as well as the effect of different pressing speed and temperature on lateral flow capacity of iron-based powders were investigated. Results s

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39

Schaerer, Magna Monteiro, Deane Roehl, and José Luís Silveira. "Numerical Analysis of Metal Powders in Uniaxial Compaction." Materials Science Forum 591-593 (August 2008): 218–22. http://dx.doi.org/10.4028/www.scientific.net/msf.591-593.218.

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Powder consolidation constitutes an important step in the manufacture of products of high quality and precision. To obtain these components, with desired forms and final mechanical properties, it is of extreme importance to have knowledge about the processes to obtain powders, compacting and sintering. The objective of this work is to verify which model, obtained from the literature, better describes the compaction densification behavior of iron powder in closed-die. Doraivelu’s criterion was carried through the method of the finite elements with the implementation of an elastoplastic model wi

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40

Belyaeva, Irina, and Viktor Mironov. "Combined Magnetic Pulsed Compaction of Powder Materials." Key Engineering Materials 746 (July 2017): 235–39. http://dx.doi.org/10.4028/www.scientific.net/kem.746.235.

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Upgrading the quality of compaction of powder materials is achieved by the use of hybrid technologies when the powders are acted upon by two or more sources of loading. The present paper describes compaction of a powder under the action of static and dynamic loads. A pulse-magnetic field is used as a dynamic load. The procedure and technique of experimental researches are described. Porosity (compactness) and structure of the material are evaluated for various combinations of loads, geometrical sizes and shapes of products. The conclusion is made about significant upgrading of quality of the p

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Tu, L. T., N. V. Vuong, N. T. Hieu, Cheol Gi Kim, and Chong Oh Kim. "Estimation for Nd-Fe-B Melt-Spun Powder Quality." Solid State Phenomena 124-126 (June 2007): 1705–8. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.1705.

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The squareness factor γ used to evaluates for criterion allowing quick estimation of the quality of NdFeB melt-spun powders on Stoner–Wohlfarth model. For the powder compaction of 6.4 g/cm3 mass density, the measured value γ=0.48 serves the evidence of the Stoner – Wohlfarth behaviour of the powder grains and the preparation conditions are optimal for producing Stoner – Wohlfarth particles. For the powder compaction of given mass densities the calibration curve of the squareness factor γ is presented. We can observe one more thing that for the ideal, full dense compaction of NdFeB Stoner – Woh

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Ke, Mei Yuan, and Zhi Yu Xiao. "Die Wall Lubricated Warm Compaction of Fe-Ni-Cu-Mo-C Powders." Advanced Materials Research 168-170 (December 2010): 1016–20. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.1016.

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The combination of warm compaction and die wall lubrication, called die wall lubricated warm compaction was used to make Fe-Ni-Cu-Mo-C powder metallurgy material. Results showed that the green density could be 7.38 g•cm-3 under the pressure of 700MPa at the temperature of 120°C. The sintered density could be 7.34 g•cm-3 and dimension change was 0.19% when sintered at 1200°C for 50 minutes. Both green density and spring back effect gradually increased as the compacting pressure rose. The relation between compacting pressure and green density could be described by Huang Pei-yun double logarithm

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Matsumoto, Roger L. K. "Analysis of Powder Compaction Using a Compaction Rate Diagram." Journal of the American Ceramic Society 73, no. 2 (1990): 465–68. http://dx.doi.org/10.1111/j.1151-2916.1990.tb06539.x.

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Kim, Se-Hoon, Young-Jung Lee, Jea-Sung Lee, and Young-Do Kim. "Compaction Properties of Fe Powder Fabricated by Warm Compaction." Journal of Korean Powder Metallurgy Institute 14, no. 3 (2007): 185–89. http://dx.doi.org/10.4150/kpmi.2007.14.3.185.

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Ardestani, Mohammad, Mohsen Rafiei, Sina Salehian, Mohammad Reza Raoufi, and Mohammad Zakeri. "Compressibility and solid-state sintering behavior of W-Cu composite powders." Science and Engineering of Composite Materials 22, no. 3 (2015): 257–61. http://dx.doi.org/10.1515/secm-2013-0159.

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AbstractIn this research, compressibility and the effect of cold compaction pressure on sintered density of tungsten (W)-15% wt copper (Cu) and W-75% wt Cu composite powders were investigated. The powders were prepared by milling and reduction of WO3/CuO powder mixtures. The crystalline size and lattice strain of WO3 and CuO were determined using Debye-Scherrer’s formula after mechanical milling. Heckel and Panelli-Ambrosio equations were used to evaluate cold compaction behavior of the reduced powders. The results showed that Heckel equation represents better correlation between compaction pr

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Page, N. W., and D. Raybould. "Dynamic powder compaction of some rapidly solidified crystalline and amorphous powders: Compaction characteristics." Materials Science and Engineering: A 118 (October 1989): 179–95. http://dx.doi.org/10.1016/0921-5093(89)90070-1.

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Güner, Faruk. "Numerical Investigation of AISI 4140 Powder High Relative Density Compaction In Terms of Compaction Velocity." Mechanics 26, no. 1 (2020): 5–11. http://dx.doi.org/10.5755/j01.mech.26.1.22862.

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In this study high relative density compaction of AISI 4140 steel powder compaction numerically investigated via different compaction velocities using Multi Particle Finite Element Method (MPFEM). 2D Analyses performed by three different particle geometry; 25µm, 35µm and 45µm in radius. Particle size effect also investigated via high relative density and compaction velocity. von Mises Power law evaluated for AISI 4140 steel powder and utilized to analysis. Results were plotted both in visually and graphically in aim to show effect of relative density, particle size, contact interactions and co

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Zhang, Bao, Idris K. Mohammed, Yi Wang, and Daniel S. Balint. "On the use of HCP and FCC RVE structures in the simulation of powder compaction." Journal of Strain Analysis for Engineering Design 53, no. 5 (2018): 338–52. http://dx.doi.org/10.1177/0309324718774188.

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Use of hexagonal close packed and face centered cubic structures to simulate powder compaction reveals that plastic deformation is effective in reducing porosity until a relative density of 0.96, beyond which a drastic rise in pressure is required. The compaction process can be divided into three phases demarcated by relative densities of 0.8 and 0.92, characterized, respectively, by local yielding around the initial contact point, coalescence of locally yielded zones and full plastic flow to reduce pores. The macroscopic yield behaviour of the powder assembly in the present work agrees reason

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Sevillano, J. Gil. "Size effects in powder compaction." Journal of Materials Research 16, no. 5 (2001): 1238–40. http://dx.doi.org/10.1557/jmr.2001.0172.

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It is well known that great difficulties are encountered in the cold compaction of ultrafine powders. Such difficulties have been qualitatively attributed to several origins (e.g., increasing relative contribution of oxidized layers to particle resistance as particle size decreases). The main densification stage during compaction is governed by plastic deformation at interparticle contacts under pressure. On account of the strength enhancement of plastic resistance in presence of plastic strain gradients (physically resolved by “geometrically necessary dislocations”) a contribution to the size

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Popescu, Ileana Nicoleta, and Ruxandra Vidu. "Compaction Behaviour Modelling of Metal-Ceramic Powder Mixtures. A Review." Scientific Bulletin of Valahia University - Materials and Mechanics 16, no. 14 (2018): 28–37. http://dx.doi.org/10.1515/bsmm-2018-0006.

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Abstract Powder mixtures compaction behavior can be quantitatively expressed by densification equations that describe the relationship between densities - applied pressure during the compaction stages, using correction factors. The modelling of one phase (metal/ceramic) powders or two-phase metal-ceramic powder composites was studied by many researchers, using the most commonly compression equations (Balshin, Heckel, Cooper and Eaton, Kawakita and Lüdde) or relative new ones (Panelli - Ambrózio Filho, Castagnet-Falcão- Leal Neto, Ge Rong-de, Parilák and Dudrová, Gerdemann and Jablonski. Also,

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