Compared with the experimental resu

Compared with the experimental results in an undercooled [Cu.sub.50][Zr.sub.50] melt

[Cu.sub.50][Zr.sub.50] alloy was undercooled by electrostatic levitation to measure the growth velocity V as function of undercooling [DELTA]T [17]. It was found that V increases firstly and then decreases with [DELTA]T; please see the solid circles in Fig. 4. Tang and Harrowell [18] reported similar results for the isothermal crystallization of the CuZr SC using the molecular dynamics simulation. Although such an abnormal V ~ [DELTA]T relation is quite different from our general understanding of the undercooled metallic melts in which V always increases with [DELTA]T [43], it was frequently observed experimentally in the organic, the inorganic and the polymeric systems [41, 42]. A viscosity-dependent [V.sub.0] proposed by fitting with the experimental results in the organic and the inorganic but not the metallic systems [41] was adopted by Wang et al. [17] to predict the V ~ [DELTA]T relation. Although [V.sup.max] 0.025 m [s.sup.-1] was reproduced, a large deviation of 127 K from the corresponding undercooling [DELTA][T.sup.[conjunction]] = 200 K(the solid circles in Fig. 4) was found. Our work for [C.sup.*.sub.L] = 0.5 (i.e,. the crystallization of the CuZr SC from the undercooled [Cu.sub.50][Zr.sub.50] melt) shows that [V.sup.max] = 0.0227 m [s.sup.-1] at [DELTA][T.sup.[conjunction].sub.I] = 132 K; please see Fig. 4. [V.sup.max] is also predicted and the difference between [DELTA][T.sup.[conjunction].sub.I] and [DELTA][T.sup.[conjunction]] 68 K is nearly two times smaller than that of Wang et al. [17] 127 K. The experimental results can be well predicted if the current growth kinetic model is incorporated into the dendrite growth theory (e.g., [44, 45]) to consider the contributions of the thermal and the curvature undercoolings to [DELTA]T.

Hasil (Bahasa Indonesia) 2:

Dibandingkan dengan hasil eksperimen dalam lewat-dingin [Cu.sub.50] [Zr.sub.50] mencair

[Cu.sub.50] [Zr.sub.50] paduan yang lewat-dingin oleh levitasi elektrostatik untuk mengukur kecepatan pertumbuhan V sebagai fungsi pelewat [DELTA] T [17]. Ditemukan bahwa V meningkat terlebih dahulu dan kemudian menurun dengan [DELTA] T; silakan lihat lingkaran padat pada Gambar. 4. Tang dan Harrowell [18] melaporkan hasil yang sama untuk kristalisasi isotermal dari CuZr SC menggunakan simulasi dinamika molekul. Meskipun demikian V ~ [DELTA] T hubungan yang abnormal sangat berbeda dari pemahaman umum kita tentang logam lewat-dingin meleleh di mana V selalu meningkat dengan [DELTA] T [43], itu sering diamati secara eksperimental dalam organik, anorganik dan sistem polimer [41, 42]. Sebuah viskositas tergantung [V.sub.0] diusulkan oleh pas dengan hasil eksperimen di organik dan anorganik tetapi tidak sistem metalik [41] diadopsi oleh Wang et al. [17] untuk memprediksi V ~ [DELTA] T kaitannya. Meskipun [V.sup.max] 0,025 m [s.sup.-1] direproduksi, penyimpangan besar dari 127 K dari sesuai pelewat [DELTA] [T.sup. [Bersamaan]] = 200 K (lingkaran padat pada Gambar. 4) ditemukan. Pekerjaan kami untuk [C.sup. *. Sub.L] = 0,5 (yaitu ,. kristalisasi dari CuZr SC dari lewat-dingin [Cu.sub.50] [Zr.sub.50] meleleh) menunjukkan bahwa [V. sup.max] = 0,0227 m [s.sup.-1] di [DELTA] [T.sup [hubungannya.] .sub.I] = 132 K; silahkan lihat Gambar. 4. [V.sup.max] juga diprediksi dan perbedaan antara [DELTA] [T.sup. [Bersamaan] .sub.I] dan [DELTA] [T.sup. [Bersamaan]] 68 K adalah hampir dua kali lebih kecil dari Wang et al. [17] 127 K. Hasil eksperimen dapat diprediksi dengan baik jika pertumbuhan Model kinetik saat dimasukkan ke dalam teori pertumbuhan dendrit (misalnya, [44, 45]) untuk mempertimbangkan kontribusi dari termal dan undercoolings kelengkungan untuk [DELTA] T.