[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fDsuDubzEnaKu1p3QTYuYyWJ5eHjfACRsebWBLErv6ZU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":12,"related":13,"source":17,"type":18},[],"2023-10-04 09:12:35",98862501,[],{"courseId":9,"courseImg":10,"courseName":11},"a50981ed669c2a91dd03808830c8ea9d","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","机械工程材料","单位时间单位体积液相中形成的晶核数目称",[14,19,25,30,35,40,45,50,55,60],{"answer":15,"createTime":5,"id":6,"options":16,"question":12,"source":17,"type":18},[],[],"v1",2,{"answer":20,"createTime":21,"id":22,"options":23,"question":24,"source":17,"type":18},[],"2023-10-04 09:12:36",98862502,[],"是凝固过程的一种特殊形式;它是在 下完成",{"answer":26,"createTime":21,"id":27,"options":28,"question":29,"source":17,"type":18},[],98862504,[],"形核率骤然增加时的过冷度称为 .△Tp= Tm",{"answer":31,"createTime":21,"id":32,"options":33,"question":34,"source":17,"type":18},[],98862505,[],"非均匀形核所需过冷度 ;作为结晶核心的固相粒子与晶核之间相似、相当程度越大,形核作用越 , 所需过冷度",{"answer":36,"createTime":21,"id":37,"options":38,"question":39,"source":17,"type":18},[],98862506,[],"过冷度不是恒定值,除了取决于金属的性质和纯度外,还取决于",{"answer":41,"createTime":21,"id":42,"options":43,"question":44,"source":17,"type":18},[],98862507,[],"结晶在恒温下进行是由于 导致",{"answer":46,"createTime":21,"id":47,"options":48,"question":49,"source":17,"type":18},[],98862508,[],"纯金属结晶的条件就是应当有一定的",{"answer":51,"createTime":21,"id":52,"options":53,"question":54,"source":17,"type":18},[],98862509,[],"冷却速度越大,则形核率越 ;晶核长大速度越 ,晶粒细小",{"answer":56,"createTime":21,"id":57,"options":58,"question":59,"source":17,"type":18},[],98862510,[],"液态金属在微小范围内紧密接触排列规则的原子集团,称为",{"answer":61,"createTime":21,"id":62,"options":63,"question":64,"source":17,"type":18},[],98862511,[],"一般来说,平面长大是在 下进行的;而树枝状长大是在 下进行的"]