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|Title: ||Nano-indentation and nano-scratch of polymer - glass interfaces : part II: model of interphases in water aged composite materials|
|Authors: ||Hodzic, A.|
Stachurski, Z. H.
|Issue Date: ||Oct-1999 |
|Citation: ||Polymer, v. 42, iss. 13, June 2001, p. 5701-5710|
|Abstract: ||The interphase region in dry and water aged polymer/glass composite materials was investigated by means of the nano-indentation and the nano-scratch techniques. The nano-indentation test involved indentation as small as 30 nm in depth in order to detect water degradation of the material properties in the transition region between the fibre and the matrix. A line of nano-indents were produced along 14μm path starting from the matrix and ending on the fibre. The distinct properties of the interphase region were revealed by 2-3 indents in dry materials and up to 15 indents in water aged, degraded materials. These results indicated interdiffusion of water aged interphase regions. The nano-scratch test involves moving a sample while being in contact with a diamond tip. The coefficient of friction, defined as the ratio of the tangential force from the tip - sample contact to the normal force, also indicated the interphase width. It was shown that the interphase region width increased and the material properties degraded during water aging. Doubts about the presence of the interphase, raised over the hardness results in the vicinity of the harder glass region, were disproved with the results showing the expansion of the interphase region during water aging. These two experimental techniques showed to be a useful tool in the investigation of the size and the character of the interphase region in the fibrous polymer/glass composite materials.|
|Rights: ||Polymer © copyright (2001) Elsevier. The Journal's web site is located at http://www.sciencedirect.com/|
|Appears in Collections:||MECH Journal/Magazine Articles|
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