MPFEM simulation on hot-pressing densification process of SiC particle/6061Al composite powders

2021 ◽  
pp. 110259
Author(s):  
Lei Xu ◽  
Yasong Wang ◽  
Changyun Li ◽  
Guoliang Ji ◽  
Guofa Mi
Keyword(s):  
Hot Pressing ◽  
Densification Process ◽  
Composite Powders ◽  
Sic Particle

scholarly journals An Experimental Study Of Aluminum Alloy Matrix Composite Reinforced SiC Made By Hot Pressing Method

2015 ◽  
Vol 60 (2) ◽  
pp. 1523-1527 ◽  
Author(s):  
M. Suśniak ◽  
J. Karwan-Baczewska ◽  
J. Dutkiewicz ◽  
M. Actis Grande ◽  
M. Rosso
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Matrix Composite ◽  
Hot Pressing ◽  
Metallic Matrix ◽  
High Energy ◽  
Composite Powders ◽  
Alloy Matrix ◽  
Pressing Method ◽  
Sic Particles

Abstract The present work investigates the possibility of using powder metallurgy processing for producing a metal matrix composite. Materials were prepared from AlSi5Cu2 chips with reinforcement of 10, 15, 20 wt. % silicon carbide. Aluminum alloy chips were milled with SiC powder in a high-energy ball mill by 40 hours. Mechanical alloying process lead to obtain an uniform distribution of hard SiC particles in the metallic matrix and refine the grain size. The consolidation of composite powders was performed by vacuum hot pressing at 450°C, under pressure of 600 MPa by 10 min. The results shows that the addition of SiC particles has a substantial influence on the microstructure and mechanical properties of composite powder as well as consolidated material. Hot pressing is an effective consolidation method which leads to obtain dense AlSi5Cu2/SiC composite with homogeneous structure and advanced mechanical properties.

Densification process for spherical glass powders with the same particle size by hydrothermal hot pressing

1991 ◽  
Vol 26 (23) ◽  
pp. 6448-6452 ◽  
Author(s):  
Kazuyuki Hosoi ◽  
Susumu Kawai ◽  
Kazumichi Yanagisawa ◽  
Nakamichi Yamasaki
Keyword(s):  
Particle Size ◽  
Hot Pressing ◽  
Densification Process ◽  
Spherical Glass ◽  
Glass Powders

Investigation of Phase Composition and Microstructure of the B4C/BN Nanocomposite Powders and the B4C/BN Nanocomposites Sintered Bulks

2011 ◽  
Vol 328-330 ◽  
pp. 1572-1575
Author(s):  
Tao Jiang
Keyword(s):  
Heat Treatment ◽  
Phase Composition ◽  
Chemical Reaction ◽  
Hot Pressing ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Composite Powders ◽  
Pressing Process ◽  
Xrd Patterns ◽  
Nanocomposite Powders

In this research, the B4C/BN nanocomposite powders were fabricated by chemical reaction and heat treatment process, then the B4C/BN nanocomposites bulks were fabricated by hot-pressing process. The B4C/BN nanocomposite powders were fabricated by chemical reaction at 550°C for 15h and heat treatment at 850°C for 6h. The B4C/BN nanocomposites bulks were fabricated by hot-pressing process at 1850°C for 1h under the pressure of 30MPa. In this research, the phase composition and microstructure of the B4C/BN nanocomposite powders produced by chemical reaction and heat treatment process were investigated. The phase composition and microstructure of the B4C/BN nanocomposites produced by hot-pressing process were investigated. The XRD patterns results showed that there existed the B4C phase and amorphous BN phase in the composite powders produced by chemical reaction and heat treatment, and the amorphous BN phase completely transformed into the h-BN phase by hot-pressing process. The XRD patterns results showed that there existed the B4C phase and h-BN phase in the composites sintered bulks. The microstructure of the synthesized B4C/BN composite powders showed that the B4C particles were surrounded with the amorphous BN nano-sized particles, the thickness of amorphous BN coated layer was about 300-500nm. The B4C/BN nanocomposites exhibited the homogenous and compact microstructure, and the nano-sized h-BN particles were homogenously distributed in the B4C matrix. The mean particles size of B4C matrix was about 2-3μm, the length of nano-sized h-BN particles was about 1-2μm and width of nano-sized h-BN particles was about 100-200nm. The B4C/BN nanocomposites bulks exhibited more homogenous and compact microstructure with the increase of h-BN content.

scholarly journals Densification Process of Sepiolite under Hydrothermal Hot-pressing.

1993 ◽  
Vol 40 (3) ◽  
pp. 355-358
Author(s):  
Yoshiaki Fukushima ◽  
Xianping Meng ◽  
Kazumichi Yanagisawa ◽  
Nakamichi Yamasaki
Keyword(s):  
Hot Pressing ◽  
Densification Process

Investigation of Microstructure and Mechanical Property of the Fe3Al/Al2O3 Composites Fabricated by Mechanical Alloying Process and Hot-Pressing Process

2011 ◽  
Vol 492 ◽  
pp. 102-106
Author(s):  
Tao Jiang ◽  
Xiao Ping Shi
Keyword(s):  
Heat Treatment ◽  
Phase Composition ◽  
Mechanical Alloying ◽  
Hot Pressing ◽  
Composite Powders ◽  
Al Content ◽  
Pressing Process ◽  
The Mean ◽  
Xrd Patterns ◽  
Microstructure And Mechanical Property

The Fe3Al/Al2O3composites were fabricated by hot-pressing process in this research. The Fe3Al intermetallics compounds powders were fabricated by mechanical alloying and heat treatment, then the Fe3Al powders and Al2O3powders were mixed and the Fe3Al/Al2O3composite powders were prepared, so the Fe3Al/Al2O3composites were fabricated by hot-pressing process at 1300°C for 2h under the pressure of 35MPa. The phase composition and microstructure of the Fe3Al intermetallics compounds powders produced by mechanical alloying and heat treatment were investigated. The phase composition, microstructure and mechanical properties of the Fe3Al/Al2O3composites sintered bulks were investigated. The XRD patterns results showed that there existed Fe3Al phase and Al2O3phase in the sintered composites. The Fe3Al/Al2O3composites sintered bulks exhibited the homogenous and compact microstructure, the Fe3Al particles were homogenously distributed in the Al2O3 matrix, the mean particles size of Fe3Al intermetallics compounds was about 3-4μm. The Fe3Al/Al2O3composites exhibited more homogenous and compact microstructure with the increase of Fe3Al content in the Al2O3matrix. The density and relative density of the Fe3Al/Al2O3composites increased gradually with the increase of Fe3Al content. The fracture strength and fracture toughness of the Fe3Al/Al2O3composites increased gradually with the increase of Fe3Al content. The elastic modulus and hardness (HRA) of the Fe3Al/Al2O3composites decreased gradually with the increase of Fe3Al content.

Property and Microstructure of Machinable B4C/BN Nanocomposites

2008 ◽  
Vol 368-372 ◽  
pp. 936-939 ◽  
Author(s):  
Tao Jiang ◽  
Zhi Hao Jin ◽  
Jian Feng Yang ◽  
Guan Jun Qiao
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
Chemical Reaction ◽  
Fracture Strength ◽  
Vickers Hardness ◽  
Hot Pressing ◽  
Composite Powders ◽  
B4c Particles ◽  
Hot Pressing Sintering ◽  
Nanocomposite Powders

The B4C/BN nanocomposites were fabricated by hot-pressing sintering of the B4C/BN nanocomposite powders at 1850oC for 1h under the pressure of 30MPa. The composite powders with the microstructure of B4C particles coated with nano-sized BN particles were prepared by the chemical reaction of H3BO3 and CO(NH2)2 on the surface of B4C particles at high temperature. The microstructure investigation of the nanocomposites sintered samples showed that the nano-sized h-BN particles were homogenously distributed in the B4C matrix. With the increasing content of h-BN, the density of the B4C/BN nanocomposites decreased gradually; the fracture strength and fracture toughness of the B4C/BN nanocomposites decreased gradually, the strength and toughness of the B4C/BN nanocomposites with the h-BN content of 10wt% and 20wt% achieved high values. The Vickers hardness of the B4C/BN nanocomposites decreased remarkably with the increasing content of h-BN, while the machinability of the B4C/BN nanocomposites was significantly improved. The B4C/BN nanocomposites with the h-BN content more than 20wt% exhibited excellent machinability.

Synthesis of Ternary Machinable Al2O3/Ti2AlC Composites by High Energy Milling and In Situ Hot-Pressing Method

2010 ◽  
Vol 658 ◽  
pp. 169-172 ◽  
Author(s):  
Fen Wang ◽  
Bo Bo Liu ◽  
Jian Feng Zhu ◽  
Ya Ling Li
Keyword(s):  
Hot Pressing ◽  
Raw Materials ◽  
High Energy ◽  
Milling Process ◽  
Vacuum Furnace ◽  
Composite Powders ◽  
Pressing Method ◽  
Fine Grained ◽  
High Energy Milling

Al2O3/Ti2AlC composites were synthesized by high energy milling and hot-pressing at 1200°C in a vacuum furnace with a pressure of 4.8×10-2 Pa, using Ti, Al and C powder as raw materials. The effect of sintering temperature on the reactions, phase composition and microstructure of the synthesized products were investigated. The results show that the TiC and TiAl intermetallics composite powders were synthesized during the milling process. After the hot pressing, Ti2AlC phase was formed by the reaction between TiC and TiAl. A small amount of Al2O3 was also produced because of the oxidation of Al in the hot press process, which formed Al2O3/Ti2AlC composite together with the Ti2AlC at 1200°C. The fine grained Al2O3 particles disperse within Ti2AlC uniformly, which play a important role to strengthen Ti2AlC matrix, resulting in the increase of flexural strength and fracture toughness from 250 to 275.4MPa, 9.8 to 10.5MPa•m1/2, respectively.

Effect of Co Content on the Densification, Microstructure and Mechanical Properties of cBN-WC/Co Composites

2015 ◽  
Vol 655 ◽  
pp. 41-44
Author(s):  
Qiu Shuang He ◽  
Hai Yan Chen ◽  
Kun Li ◽  
Li Hua Dong
Keyword(s):  
Mechanical Properties ◽  
Vickers Hardness ◽  
Hot Pressing ◽  
Cemented Carbide ◽  
Sintering Process ◽  
Composite Powders ◽  
Flexure Strength ◽  
Microstructure And Mechanical Properties ◽  
Hot Pressing Sintering ◽  
Full Densification

Hot pressing sintering process for cemented carbide preparation was investigated with cBN-WC/Co composite powders with different Co content from 4wt% to 10wt% at temperatures between 1300°C and 1400°C. The results showed that the Co content had remarkable influence on the densification and mechanical properties of cBN-WC/Co composites. Near-full densification can be obtained when cBN-WC/8wt%Co powders were sintered at temperatures at 1350°C, and pressures at 20MPa, combining an excellent Vickers hardness of 17.57GPa with an acceptable flexure strength of 601.58MPa.

scholarly journals Effects of Preparation Methods on the Thermoelectric Performance of SWCNT/Bi2Te3 Bulk Composites

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2636 ◽  
Author(s):  
Yuqi Liu ◽  
Yong Du ◽  
Qiufeng Meng ◽  
Jiayue Xu ◽  
Shirley Z. Shen
Keyword(s):  
Hot Pressing ◽  
Pressureless Sintering ◽  
Sintering Process ◽  
Composite Powders ◽  
Preparation Methods ◽  
Single Walled Carbon Nanotube ◽  
Cold Pressing ◽  
Seebeck Coefficients ◽  
Pressing Process ◽  
One Step

Single-walled carbon nanotube (SWCNT)/Bi2Te3 composite powders were fabricated via a one-step in situ reductive method, and their corresponding bulk composites were prepared by a cold-pressing combing pressureless sintering process or a hot-pressing process. The influences of the preparation methods on the thermoelectric properties of the SWCNT/Bi2Te3 bulk composites were investigated. All the bulk composites showed negative Seebeck coefficients, indicating n-type conduction. A maximum power factor of 891.6 μWm−1K−2 at 340 K was achieved for the SWCNT/Bi2Te3 bulk composites with 0.5 wt % SWCNTs prepared by a hot-pressing process, which was ~5 times higher than that of the bulk composites (167.7 μWm−1K−2 at 300 K) prepared by a cold-pressing combing pressureless sintering process, and ~23 times higher than that of the bulk composites (38.6 μWm−1K−2 at 300 K) prepared by a cold-pressing process, mainly due to the enhanced density of the hot-pressed bulk composites.

Sign in / Sign up

Export Citation Format

Share Document