根据所示Fe-W-C三元系的低碳部分的液相面的投影图,试标出所 有四相反应

考虑在一个大气压下液态铝的凝固,对于不同程度的过冷度,即:△ T=1,10,100和200℃,计算: (a)临界晶核尺寸 (b)半径为r+的晶核个数; (c)从液态转变到固态时,单位体积的自由能变化ΔG*(形核

一块含0.1%C的碳钢在930℃渗碳,渗到0.05cm的地方碳的浓度 达到0.45%。在t>0的全部时间,渗碳气氛保持表面成分为 1%,假设D=2.0×10-5exp(-10000/RT)(m2/s)

已知纯钛有两种同素异构体,低温稳定的密排六方结构C-1和高温稳定的体心立 方结构-2,其同素异构转变温度为825℃,计算纯钛在室温(20℃)和900c 时晶体中(112)和(001)的晶面间距(已知a20℃=0.2951mm,ca20c=0.4679nm,apw0oe =0.3307nm)

1、由 Clausius- Clapeyron方程可知,随着压力的增加,yFe转变成a-e的温度 A、升高 B、降低 C、不变

Task Team of FUNDAMENTAL ACCOUntING hool of Business, Sun Y at-sen University Lesson 14 Managerial Accounting Il: Application L. True and False Questions Decision making is a distinct management activity that should be separated from budgeting

Task Team of FUNDAMENTAL ACCOUntING hool of Business, Sun Y at-sen University Lesson 13 Managerial Accounting I: Concepts and Principles Self-Test I. True and False Questions Managerial accounting places less emphasis on precision and more emphasis on flexibility

Task Team of FUNDAMENTAL ACCOUntING hool of Business, Sun Y at-sen University Lesson 12 Internal Controls and Business ethics Self-Test True or False 1. The accounts receivable subsidiary ledger controls the accounts receivable account in the genel

Task Team of FUNDAMENTAL ACCOUntING hool of Business, Sun Y at-sen University Understanding Accounting Standards es True and False Questions 1. Accounting standards are laws accountants should follow in their work

ask Team of FUNDAMENTAL aCcoUnting School of Business Sun Yat-sen Universit Lesson 10 Understanding and Using financial Statements What type of analysis is indicated by the following? Percent Current assets