先进材料疑固实验室 Laboratory of Advanced Materials Solidification 1896 1920 1987 2006 Metal Casting Technology (3) Dr.Mingxu Xia ® 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY
1896 1920 1987 2006 Metal Casting Technology (3) Dr. Mingxu Xia
先进材料疑固实验室 Outline Laboratory of Advanced Materials Solidification Introduction Casting practice Design considering in casting Design for expendable-mold casting Major casting processes ory of Advanced M 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY
Outline Introduction Casting practice Design considering in casting Design for expendable-mold casting Major casting processes
先进材料疑固实验室 Laboratory of Advanced Materials Solidification 1896 1920 1987 2006 SINGLE CRYSTAL GROWTH 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY
1896 1920 1987 2006 SINGLE CRYSTAL GROWTH
先进材料疑固实验室 Growth of Single Crystals Laboratory of Advanced Materials Solidification In scientific studies and industrial applications,very often it is necessary to grow single crystals of metals,alloys or compounds. GR中摄随会 Fweel Solar.ofweek.com 太阳能光伏网 Germanium wafer cut Silicon single crystal ingot Germanium single crystal from a single crystal ingot ingot 上浒充通大 SHANGHAI JIAO TONG UNIVERSITY
Growth of Single Crystals In scientific studies and industrial applications, very often it is necessary to grow single crystals of metals, alloys or compounds. Silicon single crystal ingot Germanium single crystal ingot Germanium wafer cut from a single crystal ingot
先进材料疑固实验室 Growth of Single Crystals Laboratory of Advanced Materials Solidification Typical methods of growing single crystals: Normal freezing method:move the crucible(or boat)containing molten metal or alloy relative to the furnace in one direction to allow the crystal grow in only one direction. If the crucible is vertical,the method is also called Bridgeman method. Zone melting method:melt a small part of an ingot and move the molten zone along the ingot from one end to the other end. Sometime,zone melting is done without using crucible,in this case,the method is also called floating zone method. Crystal pulling method(also called Czochraski method):pull a crystal seed from a pool of liquid. 上游充通大学 SHANGHAI JIAO TONG UNIVERSITY
Typical methods of growing single crystals: Normal freezing method: move the crucible (or boat) containing molten metal or alloy relative to the furnace in one direction to allow the crystal grow in only one direction. • If the crucible is vertical, the method is also called Bridgeman method. Zone melting method: melt a small part of an ingot and move the molten zone along the ingot from one end to the other end. • Sometime, zone melting is done without using crucible, in this case, the method is also called floating zone method. Crystal pulling method (also called Czochraski method): pull a crystal seed from a pool of liquid. Growth of Single Crystals