Lecture note 3 (09-13-2011)

Lecture note 3 (09-13-2011) - MAE 581 Advanced Materials...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 MAE 581 Advanced Materials Science Lecture note 3 Miller–Bravais indices It should be borne in mind that the general purpose of the Miller procedure is to define the orientation of a family of parallel equidistant planes; the selection of a convenient representative plane is a means to this end. For this reason, it is permissible to shift the origin provided that the relative disposition of a , b and c is maintained. Miller indices are commonly written in the symbolic form ( h k l ). As mentioned previously, it is sometimes convenient to choose a non-primitive cell. The hexagonal structure cell is an important illustrative example. For reasons which will be explained, it is also appropriate to use a four-axis Miller–Bravais notation ( h k i l ) for hexagonal crystals , instead of the three-axis Miller notation ( h k l ). In this alternative method, three axes ( a 1 , a 2 , a 3 ) are arranged at 120 o to each other in a basal plane and the fourth axis ( c ) is perpendicular to this plane (Figure 1.9a). Hexagonal structures are often compared in terms of the axial ratio
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/16/2012 for the course MAE 581 taught by Professor Fu during the Fall '11 term at SUNY Buffalo.

Page1 / 2

Lecture note 3 (09-13-2011) - MAE 581 Advanced Materials...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online