In situ synthesis, mechanical properties, and microstructure of reactively hot pressed WB4 ceramic with Ni as a sintering additive

Titanium composite strengthened by Ti3Al precipitations is considered to be one of the excellent materials that is widely used in engineering. In this work, we prepared a kind of Ti-Ti3Al metallic composite by in-situ synthesis technology during the SLM (selective laser melting) process, and analyzed its microstructure, wear resistance, microhardness, and compression properties. The results showed that the Ti-Ti3Al composite, prepared by in-situ synthesis technology based on SLM, had more homogeneous Ti3Al-enhanced phase dispersion strengthening structure. The grain size of the workpiece was about 1 μm, and that of the Ti3Al particle was about 200 nm. Granular Ti3Al was precipitated after the aluminum-containing workpiece formed, with a relatively uniform distribution. Regarding the mechanical properties, the hardness (539 HV) and the wear resistance were significantly improved when compared with the Cp-Ti workpiece. The compressive strength of the workpiece increased from 886.32 MPa to 1568 MPa, and the tensile strength of the workpiece increased from 531 MPa to 567 MPa after adding aluminum. In the future, the combination of in-situ synthesis technology and SLM technology can be used to flexibly adjust the properties of Ti-based materials.

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In situ synthesis of ternary BaTiO3/MWNT/PBO electromagnetic microwave absorption composites with excellent mechanical properties and thermostabilities

Journal of Materials Chemistry A ◽

10.1039/c5ta01410g ◽

2015 ◽

Vol 3 (15) ◽

pp. 8205-8214 ◽

Cited By ~ 30

Author(s):

Jia Wei ◽

Shuo Zhang ◽

Xiaoyun Liu ◽

Jun Qian ◽

Jiasong Hua ◽

...

Keyword(s):

Mechanical Properties ◽

Microwave Absorption ◽

In Situ Synthesis ◽

Absorption Properties ◽

Microwave Absorption Properties

BaTiO3/MWNT/PBO ternary composites with excellent microwave absorption properties, mechanical properties and thermostabilities.

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Effect of Dehydration Methods on Mechanical Strength of Nanohydroxyapatite/Collagen Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.330-332.349 ◽

2007 ◽

Vol 330-332 ◽

pp. 349-352

Author(s):

Xiao Yan Lin ◽

Xu Dong Li ◽

Xing Dong Zhang

Keyword(s):

Mechanical Properties ◽

Binding Energy ◽

Freeze Drying ◽

Bending Strength ◽

Bond Formation ◽

In Situ Synthesis ◽

Drying Methods ◽

Key Factors ◽

Air Drying

Hydroxyapatite/collagen composites were prepared in-situ synthesis. The composites were finally achieved by dehydration including air-drying and freeze-drying methods. FTIR, XPS and DSC were employed to investigate the composites dehydrated by two methods. The air-dried composites had better mechanical properties than those of the composites dried by freeze drying. Air-drying of the composite induced more bond formation and crosslink between collagen fibers and HA crystals compared with freeze-drying of the composite, as indicated by the shifting of amide A and I bands to the lower wavenumber and by the changes in the binding energy of O1s, Ca2p, and P2p, leading to the increase of the peak temperature of the composites. Collagen crosslink and bond formation in the air-dried composites were key factors to increase the bending strength of the composites. The results of this study confirm that in situ synthesis and air-dry method are effective ways to obtain nanoHA/COL composites with high mechanical properties.

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In-situ synthesis of YAG@Si3N4 powders with enhanced mechanical properties

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2017.10.064 ◽

2018 ◽

Vol 731 ◽

pp. 813-821 ◽

Cited By ~ 4

Author(s):

Chaochao Ye ◽

Xinyan Yue ◽

Hui Zong ◽

Guangfu Liao ◽

Hongqiang Ru

Keyword(s):

Mechanical Properties ◽

In Situ Synthesis

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In situ synthesis, mechanical properties, and oxidation resistance of (SiC+ZrB 2 )/Zr 3 [Al(Si)] 4 C 6 composites

Corrosion Science ◽

10.1016/j.corsci.2016.04.037 ◽

2016 ◽

Vol 110 ◽

pp. 182-191 ◽

Cited By ~ 5

Author(s):

Lei Yu ◽

Limei Pan ◽

Jian Yang ◽

Yongbao Feng ◽

Jingxian Zhang ◽

...

Keyword(s):

Mechanical Properties ◽

Oxidation Resistance ◽

In Situ Synthesis

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Nickel-Alumina Composites: In Situ Synthesis by a Displacement Reaction, and Mechanical Properties

MRS Proceedings ◽

10.1557/proc-365-53 ◽

1994 ◽

Vol 365 ◽

Cited By ~ 1

Author(s):

Steven A. Jones ◽

James M. Burlitch ◽

Ersan Üstündag ◽

Jeannie Yoo ◽

Alan T. Zehnder

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Elastic Constants ◽

High Performance ◽

In Situ Synthesis ◽

Displacement Reaction ◽

Ductile Phase ◽

Flexure Strength ◽

Alumina Composites

ABSTRACTNickel-alumina composites have the potential to be high performance materials. Alumina, with its excellent oxidation resistance, combined with a ductile phase such as nickel may provide a tough material with a lower density and higher Young's modulus, overall, a higher specific modulus than typical Superalloys. Dense, interpenetrating Ni-Al2O3 composites were synthesized using a displacement reaction between NiO and aluminum. The resulting composites were characterized in terms of their mechanical properties such as hardness, flexure strength, fracture toughness and elastic constants. The synthesis, characterization, and mechanical properties, as well as the effect of the interpenetrating microstructure on the toughening mechanisms and other properties will be discussed.

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