Tailoring martensitic transformation and mechanical properties of Ti–Ni composite reinforced by network structure of in-situ TiB and La2O3 phase

Vacuum ◽  
2021 ◽  
Vol 184 ◽  
pp. 109894 ◽  
Author(s):  
Xiaoyang Yi ◽  
Haizhen Wang ◽  
Kuishan Sun ◽  
Guijuan Shen ◽  
Xianglong Meng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Martensitic Transformation ◽  
Network Structure

The Compositional Effect of Water-Soluble POSS Hybrid PNIPA Nanocomposite Hydrogels

2014 ◽  
Vol 1044-1045 ◽  
pp. 133-136
Author(s):  
Yi Chen ◽  
Wen Yong Liu ◽  
Guang Sheng Zeng ◽  
Jun Hong Yang
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Radical Polymerization ◽  
Network Structure ◽  
Compression Strength ◽  
Water Soluble ◽  
Elongation At Break ◽  
Compositional Effect ◽  
Nanocomposite Hydrogels

The nanosized water-soluble Oa-POSS particles were added into the PNIPA hydrogels by in situ radical polymerization as a reinforce agent. The mechanical properties are determined by the composition of gels. With the increase of Oa-POSS, the tensile and compression strength is enhanced significantly, while, the elongation at break is still low. The increased BIS, related to the tighter network structure, results in better compression strength, but the tensile properties is not improved obviously.

In situ observation of the martensitic transformation in (Mg,Y)-PSZ

1986 ◽  
Vol 44 ◽  
pp. 500-501
Author(s):  
R-R. Lee
Keyword(s):  
Martensitic Transformation ◽  
High Strength ◽  
Nucleation And Growth ◽  
In Situ Observation ◽  
Considerable Potential ◽  
Transmission Electron ◽  
Structural Applications ◽  
Applied Stresses ◽  
Kinetics Of

Partially-stabilized ZrO2 (PSZ) ceramics have considerable potential for advanced structural applications because of their high strength and toughness. These properties derive from small tetragonal ZrO2 (t-ZrO2) precipitates in a cubic (c) ZrO2 matrix, which transform martensitically to monoclinic (m) symmetry under applied stresses. The kinetics of the martensitic transformation is believed to be nucleation controlled and the nucleation is always stress induced. In situ observation of the martensitic transformation using transmission electron microscopy provides considerable information about the nucleation and growth aspects of the transformation.

Dynamics of Nanoparticle Chain Aggregates of Carbon Under Tension

2003 ◽  
Vol 778 ◽  
Author(s):  
Rajdip Bandyopadhyaya ◽  
Weizhi Rong ◽  
Yong J. Suh ◽  
Sheldon K. Friedlander
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Polymer Film ◽  
Elastic Behavior ◽  
Small Strains ◽  
Transmission Electron ◽  
Chain Aggregates ◽  
Nanoparticle Chains ◽  
Reinforcing Filler

AbstractCarbon black in the form of nanoparticle chains is used as a reinforcing filler in elastomers. However, the dynamics of the filler particles under tension and their role in the improvement of the mechanical properties of rubber are not well understood. We have studied experimentally the dynamics of isolated nanoparticle chain aggregates (NCAs) of carbon made by laser ablation, and also that of carbon black embedded in a polymer film. In situ studies of stretching and contraction of such chains in the transmission electron microscope (TEM) were conducted under different maximum values of strain. Stretching causes initially folded NCA to reorganize into a straight, taut configuration. Further stretching leads to either plastic deformation and breakage (at 37.4% strain) or to a partial elastic behavior of the chain at small strains (e.g. 2.3% strain). For all cases the chains were very flexible under tension. Similar reorientation and stretching was observed for carbon black chains embedded in a polymer film. Such flexible and elastic nature of NCAs point towards a possible mechanism of reinforcement of rubber by carbon black fillers.

Effect of TiB2 particle addition on the mechanical properties of Al/TiB2 in situ formed metal matrix composites

2018 ◽  
Vol 60 (12) ◽  
pp. 1221-1224 ◽  
Author(s):  
Balachandran Gobalakrishnan ◽  
P. Ramadoss Lakshminarayanan ◽  
Raju Varahamoorthi
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Tib2 Particle ◽  
Matrix Composites ◽  
Particle Addition
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