Electron microscopy
 
Reduced Glass Transition Temperature
- Practical Electron Microscopy and Database -
- An Online Book -
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This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
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Reduced glass transition temperature, Trg, is the ratio of the glass transition temperature Tg to the melting temperature Tm of an alloy. In general, higher reduced glass transition temperature improves the glass-forming ability.

Figure 3068 shows the critical cooling rate (Rc) and critical casting thickness (dc) for formation of various metallic glass alloys from melts as a function of reduced glass transition temperature (Trg). In general, as the reduced glass transition temperature increases, the required cooling rate for glass formation decreases, and thus it is possible to form thicker glasses at slower cooling rates.

Critical cooling rate and critical casting thickness for formation of various metallic glass alloys from melts as a function of reduced glass transition temperature
1: Ni
2:Fe89B11
3:Fe83B17
4:Fe41.5Ni41.5B17
5:Fe79Si10B11
6:Au55Pb22.5Sn22.5
7:Pt60Ni15P25
8:Mg65Cu25Y10
9:Zr65Cu17.5Ni10Al7.5
10:Zr52.5Ti5Cu17.9Ni14.6Al10
11:Ce68Al10Cu20Nb2
12:Ni62.4Nb37.6
13:Te
14:Fe91B9
15:Au77.8Ge13.8Si8.4
16:Co75Si15B10
17:Fe80P13C7
18:Pd82Si18
19:Pd77.5Cu6Si16.5
20:Zr57Nb5Cu15.4Ni12.6Al10
21:Au49Ag5.5Pd2.3Cu26.9Si16.3
22:Pt57.5Cu14.7Ni5.3P22.5
23:Pd40Ni40P20
24:Pd40Cu30Ni10P20
25:Ni75Si8B17
26:Ti34Zr11Cu47Ni8
27:Zr41.2Ti13.6Cu12.5Ni10Be22.5
28: La55Al25Ni10Cu10
29: Fe40Ni40P14B6
30:La55Al25Ni20
31:Zr60Al20Ni20
32: Ge2Sb2Te5

Figure 3068. Critical cooling rate and critical casting thickness for formation of various metallic glass alloys from melts as a function of reduced glass transition temperature.

 

 

 

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