A one-step hot pressing molding method of polyacrylonitrile carbon fibers: influence on surface morphology, microstructure and mechanical property

The B4C/BN composites were fabricated by hot-pressing process in this research. The B4C/BN composites included the B4C/BN microcomposites and the B4C/BN nanocomposites. The B4C/BN microcomposites were fabricated by hot-pressing process, and the B4C/BN nanocomposites were fabricated by chemical reaction and hot-pressing process. In this research, the phase composition, microstructure, mechanical property and machinability of the B4C/BN microcomposites and B4C/BN nanocomposites were investigated. The XRD patterns results showed that there existed B4C phase and h-BN phase in the hot-pressed composites. The microstructure of the B4C/BN composites was investigated by SEM and TEM. The B4C/BN microcomposites and the B4C/BN nanocomposites sintered bulks exhibited the homogenous and compact microstructure, and the h-BN particles were homogenously distributed in the B4C matrix. The mechanical property of the B4C/BN microcomposites and the B4C/BN nanocomposites decreased gradually with the increase of h-BN content. The mechanical property of the B4C/BN nanocomposites was remarkably improved in comparison with the B4C/BN microcomposites. The machinability of the B4C/BN microcomposites and the B4C/BN nanocomposites increased gradually with the increase of h-BN content, the drilling rates of the B4C/BN composites specimens increased gradually with the increase of h-BN content. The relationship between the microstructure and machinability of the B4C/BN composites was analyzed. The microstructure showed that the weak interface of B4C/BN and cleavage behavior of laminate structured h-BN particles remarkably improved the machinabilty of B4C/BN composites.

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Effects of ZrC content on the microstructure and mechanical property of ZrC/ZTA composites consolidated by hot pressing

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.158402 ◽

2021 ◽

Vol 860 ◽

pp. 158402

Author(s):

Shufen Li ◽

Yabin Zhu ◽

Jianlong Chai ◽

Yiwen Liu ◽

Lijuan Niu ◽

...

Keyword(s):

Mechanical Property ◽

Hot Pressing ◽

Microstructure And Mechanical Property

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Preparation of High Strength Mo(Si, Al)2-SiC Composite by Melt Infiltration Process

Volume 6: Materials and Fabrication, Parts A and B ◽

10.1115/pvp2009-77249 ◽

2009 ◽

Author(s):

XiaoLi Zhang

Keyword(s):

Mechanical Property ◽

Hot Pressing ◽

Bending Strength ◽

High Strength ◽

Infiltration Process ◽

Melt Infiltration ◽

Microstructure And Mechanical Property ◽

Better Than

The Mo(Si, Al)2-SiC composite was prepared by infiltrating melted aluminum into MoSi2+C compacts at 1350°C, and the microstructure and mechanical property of this composite were analyzed. The results showed that the phases of these composite are Mo(Si1-x, Alx)2 and SiC, and a small amount of Mo5Si3C and Al. Increasing the value of x, the amount of Mo5Si3C and Al phases decrease and even disappear gradually. The microstructure of this composite is sheet-like Mo(Si, Al)2 with needle-like SiC distributed in its gap, and parts of SiC are whisker-like. When x = 0.2, the bending strength of the composite reaches the maximum, which was 770 MPa. The bending strength of designed composite prepared by melt infiltration in this study is better than that of the composite prepared by hot pressing reported in literature.

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Microstructure and mechanical property of B4C–SiC–CrB2 composites fabricated via reactive hot pressing

Ceramics International ◽

10.1016/j.ceramint.2020.08.100 ◽

2020 ◽

Vol 46 (18) ◽

pp. 29261-29270

Author(s):

Shuai Wang ◽

Yangyang Deng ◽

Mingsheng Yang ◽

Luyao Wang ◽

Huaiqian Li ◽

...

Keyword(s):

Mechanical Property ◽

Hot Pressing ◽

Reactive Hot Pressing ◽

Microstructure And Mechanical Property

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Microstructure and mechanical property of Cu2O–Cu cermet prepared by in-situ reduction-hot pressing method

Materials Letters ◽

10.1016/j.matlet.2008.02.002 ◽

2008 ◽

Vol 62 (17-18) ◽

pp. 3121-3123 ◽

Cited By ~ 5

Author(s):

L.C. Feng ◽

W.Z. Shao ◽

L. Zhen ◽

N. Xie

Keyword(s):

Mechanical Property ◽

Hot Pressing ◽

In Situ Reduction ◽

Pressing Method ◽

Microstructure And Mechanical Property

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Properties of Ni–ZrO2 nanocomposite coatings by electroplating

International Journal of Modern Physics B ◽

10.1142/s0217979219400241 ◽

2019 ◽

Vol 33 (01n03) ◽

pp. 1940024

Author(s):

Chao Xiong ◽

Jin Xiao ◽

Yu Zhao ◽

Yuxin Wang ◽

See Leng Tay ◽

...

Keyword(s):

Mechanical Properties ◽

Mechanical Property ◽

Surface Morphology ◽

Composite Coatings ◽

Nanocomposite Coatings ◽

Wear Property ◽

Nanoparticles Concentration ◽

Microstructure And Mechanical Property ◽

Wear Tests

The microstructure, microhardness and wear property of electroplated Ni–ZrO2 nanocomposite coatings with different ZrO2 concentration were analyzed using SEM, microhardness and wear tests. It was found that in the composite coatings, incorporation of ZrO2 particles improves the mechanical property of Ni coatings and the effect of ZrO2 nanoparticles concentration on the surface morphology, microstructure and mechanical property of electroplated coatings was discussed. The mechanical properties of Ni–ZrO2 coatings reach the optimum value when the ZrO2 concentration is 10 g/L.

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