Why is fcc more ductile than bcc - Physics Forums
2011年11月14日 · The bcc lattice, although cubic, is not closely packed and forms strong metals. Alpha-iron and tungsten have the bcc form. The fcc lattice is both cubic and closely packed and forms more ductile materials. Gamma-iron, silver, gold, and lead have fcc structures. Finally, HCP lattices are closely packed, but not cubic.
Are FCC or BCC Crystal Structures Stronger? - Physics Forums
2009年3月4日 · FCC metals tend to have more slip systems compared to BCC metals, resulting in easier deformation and higher ductility. The atomic packing factor (APF) is an important factor in determining the number of slip systems in a crystal structure. BCC metals are generally stronger than FCC metals, while HCP metals are the most brittle.
Why is the volume of FCC and BCC different in reciprocal space?
2015年6月2日 · The formula for calculating the volume of a BCC/FCC unit cell is V = a^3, where "a" is the length of the edge of the unit cell. This is because in BCC/FCC structures, the unit cell is a cube, and all edges have the same length. How does the volume of a BCC/FCC structure change with temperature? As temperature increases, the volume of a BCC/FCC ...
Preferred Crystal Structure of Steel (BCC vs FCC) - Physics Forums
2016年3月21日 · BCC (body-centered cubic) and FCC (face-centered cubic) are two different types of crystal structures that can exist in steel. In BCC, the atoms are arranged in a cubic lattice with one atom at each corner and one in the center of the cube. In FCC, the atoms are arranged in a similar cubic lattice, but with one atom at each corner and one in ...
Determine if BCC or FCC structure - Physics Forums
2010年12月2日 · FCC or BCC isn't just determined by the radius or density. it is also determined by the direction of bonds that particular element prefers. if there is no preferred direction, all elements wud settle into either FCC or HCP (or a ramdom close packing). but on the other hand no preferred direction is usually a sign of chemical inertness, so they wud rather be gaseous.
How Does Compression Transform FCC Lattice to BCC and Affect …
2015年4月19日 · In FCC and BCC structures, a higher Miller index indicates that the crystal plane is closer to being parallel to the corresponding axis. For example, a plane with Miller indices (0,0,1) is parallel to the c-axis, while a plane with Miller indices (0,0,2) is even closer to being parallel to the c-axis.
Solid State Physics, FCC or BCC and why?
2016年9月7日 · For fcc I got 2(sqrt(2))(radius)-2(radius), again, (assuming this equation is correct) I think you input the Cl as radius. The Attempt at a Solution So I know NaCl is supposed to be fcc and CsCl is bcc. For NaCl, I got the hole size (using fcc formula) to be 1.49 Angstroms and that is bigger than .97 Ang for Na.
Miller Indices for FCC and BCC and XRay Diffraction Peaks
2010年1月28日 · Miller Indices for FCC and BCC structures are determined by taking the reciprocals of the intercepts of a crystal plane on the three axes of the unit cell. For example, in an FCC structure, a plane that intersects the x, y, and z axes at 1/2, 1/3, and 1/4 respectively, would have Miller Indices of (2,3,4).
The number of lattice point in FCC? - Physics Forums
2012年3月4日 · In summary, the number of lattice points in FCC (face-centered cubic) structure is 4, while BCC (body-centered cubic) has 2 lattice points. This is due to the fact that atoms at different locations within the unit cell are shared between multiple unit cells, resulting in a fractional count for each atom.
Crystal Structures: Finding Positions Per Unit Cell - Physics Forums
2008年11月6日 · In summary, the conversation was about understanding the tetrahedral and octahedral sites in face centered cubic (fcc) and body centered cubic (bcc) structures. It was mentioned that there are 8 tetrahedron per unit cell in fcc and 12 tetrahedron per unit cell in bcc. For the octahedral, there are 4 per unit cell in fcc and 6 per unit cell in bcc.