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Lin, Jianguo; Wen, Cuié; Zhang, Y. G.; Chen, C. Q.

doi:10.1023/a:1006605628150

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Growth-nature of growth front and mechanism of g m growth According to Perepezko [32] and Massalski, [33] the growth of a massively transformed product may be achieved by either of the following two mechanisms: (1) thermally activated short-range jump of atoms across the incoherent interface, in which the interface should be curved; or (2) ledge mechanism, in which the interface should be planar. On the other hand, Lin et al [34] reported a completely coherent interface preserving the perfect crystallographic orientation relationship, i.e., (111) gm // (0001) a and [110] gm // [11 ʳ 20] a and, hence, suggested a ledge mechanism for the growth of g m . [8,15,17,18,34] Denquin and Naka [8] reported the g m /a interface to be curved.…”

Section: E Mechanism Of Massive Transformationmentioning

confidence: 99%

Influence of alloying elements on the kinetics of massive transformation in gamma titanium aluminides

Prasad

Chaturvedi

2003

Metall Mater Trans A

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The effect of alloying elements, Nb and Mn on massive transformation in Ti-45Al based alloys was studied. The alloy samples were heat treated at 1350 °C for 30 minutes and subsequently cooled to room temperature by furnace cooling, air cooling, and water quenching. The microstructural evolution in various alloys was investigated by a detailed microstructural characterization of the heattreated samples by optical, scanning, and transmission electron microscopy. It was observed that the volume fraction of the massively transformed gamma in water-quenched samples increased from nil in the Mn-free alloy to ϳ70 pct in the alloy containing 2 at. pct Mn. Nb had a minimal effect on the extent of transformation. The effects of Nb and Mn have been rationalized on the basis of the site occupancy of the alloying elements and their possible influence on the phase boundaries and grain size. An attempt has also been made to elucidate the mechanism of massive transformation in these alloys. Based on the results obtained, the influence of Mn and Nb on the kinetics of massive transformation is presented and discussed and, the CCT diagrams for different alloys used in this study are proposed.

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Section: E Mechanism Of Massive Transformationmentioning

confidence: 99%

Influence of alloying elements on the kinetics of massive transformation in gamma titanium aluminides

Prasad

Chaturvedi

2003

Metall Mater Trans A

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“…When a movable discontinuity, such as interfacial defects combining the characteristics of dislocations and ledges, exist in the ZnO/p-InP heterointerface [22], the combined mechanisms for the dislocations and the ledges can be described on the basis of stacking faults bounded by partial dislocations with a Burgers vector b = 1 3 1 100 ZnO in the heterointerface between the parent and the product phases originating from the ledges [19]. The risers of the ledges at the heterointerface are typically related to the noncoherent boundaries for thermally activated atoms with easy diffusion [23]. However, the ledge of the (002) ZnO /( 121) P 2 O 5 heterointerface is coherent because the unit cell of the P 2 O 5 NCs has a constant c-value due to the kickout diffusion mechanism based on the fixed oxygen sublattice [16,24].…”

Section: Resultsmentioning

confidence: 99%

The creation of sub-10 nm In(PO₃)₃nanocrystals in an insulating matrix, and underlying formation mechanisms

et al. 2009

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Sub-10 nm In(PO(3))(3) nanocrystals (NCs) were created in an insulating matrix by rapid thermal annealing to form nanocomposite structures. On annealing at a temperature of 400 degrees C, P(2)O(5) NCs were formed by substituting P for Zn atoms in ZnO films via the kickout diffusion mechanism based on the fixed oxygen sublattice. On annealing at a higher temperature of 600 degrees C, however, In(PO(3))(3) NCs were nucleated by diffusion of In atoms from the substrate into the sites of P(2)O(5) NCs that coalesced by moving atoms to neighboring grains in the strain relaxed region. The formation mechanisms of sub-10 nm In(PO(3))(3) NCs in an insulating matrix due to rapid thermal annealing are described on the basis of the experimental results.

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“…The repeat unit of polypropylene lacks reactive functional groups, and there has been great difficulty in the bonding of glass fibres and PP. It has been necessary to graft PP so as to incorporate a reactive functional group [1][2][3][4][5] or else treat glass fibres with coupling agents and other treatment agents to improve the bonding strength 6 . Colloidal silica is a nanoscale powder and possesses silanol (Si-OH) groups on its surface, so it has good reactivity with glass fibres, which also have plenty of Si-OH groups on their surface, enabling them to form siloxane (Si-O-Si) groups [7][8] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Colloidal Silica on Adhesion of Glass Fibres to Polypropylene

Chou

Lin

2001

Polymers and Polymer Composites

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Colloidal silica was used to treat glass fibres to improve their adhesion to polypropylene resin (PP). The glass fibres were also treated with a coupling agent and maleic anhydride modified polypropylene emulsion (MAPP) to enhance their interfacial bonding. The surfaces of the glass fibres were observed by scanning electron microscopy (SEM). Because colloidal silica made the surfaces of the glass fibres rougher, PP could anchor on the surface of glass fibres to improve the fibre/PP bonding. These results were proved by using a microbonding pull-out test. The composites of glass fibres and PP were fabricated by means of a twin screw extruder and an injection moulding machine. The tensile strength and flexural strength were determined and the fracture surfaces were observed by SEM to establish the contribution of the surface treatment. The test results demonstrate that the tensile strength of the composites reinforced by those glass fibres treated with colloidal silica first and then with coupling agent and MAPP was 73.4% higher than that of composites reinforced with untreated glass fibres, and 24.0% higher than that of composites without colloidal silica but still treated with coupling agent and MAPP. As for the flexural strength, the colloidal silica, coupling agent and MAPP-treated composite was 75.9% stronger than the untreated ones and 22.3% stronger than materials without colloidal silica but treated with both coupling agent and MAPP.

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Untitled

Cited by 6 publications

References 2 publications

Influence of alloying elements on the kinetics of massive transformation in gamma titanium aluminides

Influence of alloying elements on the kinetics of massive transformation in gamma titanium aluminides

The creation of sub-10 nm In(PO₃)₃nanocrystals in an insulating matrix, and underlying formation mechanisms

Effect of Colloidal Silica on Adhesion of Glass Fibres to Polypropylene

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Untitled

Cited by 6 publications

References 2 publications

Influence of alloying elements on the kinetics of massive transformation in gamma titanium aluminides

Influence of alloying elements on the kinetics of massive transformation in gamma titanium aluminides

The creation of sub-10 nm In(PO3)3nanocrystals in an insulating matrix, and underlying formation mechanisms

Effect of Colloidal Silica on Adhesion of Glass Fibres to Polypropylene

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Product

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The creation of sub-10 nm In(PO₃)₃nanocrystals in an insulating matrix, and underlying formation mechanisms